| 210 |
Mining \ n.s. (ext.) |
048 |
| 21111 |
Cycling plant (ext.) |
037 |
| 21111 |
Derricks, oil (ext.) |
037 |
| 21111 |
Impounding salt water petroleum (ext.) |
037 |
| 21111 |
Oil production (ext.) |
037 |
| 21111 |
Oil sand (ext.) |
037 |
| 21111 |
Well, oil (ext.) |
037 |
| 211111 |
Crude oil (ext.) |
037 |
| 211111 |
Crude oil production (ext.) |
037 |
| 211111 |
Crude petroleum (ext.) |
037 |
| 211111 |
Crude petroleum production (ext.) |
037 |
| 211111 |
Gas field (ext.) |
037 |
| 211111 |
Natural gas (ext.) |
037 |
| 211111 |
Natural gas compressing (ext.) |
037 |
| 211111 |
Natural gasoline production (ext.) |
037 |
| 211111 |
Oil shale (ext.) |
037 |
| 211111 |
Oil well (ext.) |
037 |
| 211111 |
Petroleum crude production (ext.) |
037 |
| 211111 |
Petroleum oil production (ext.) |
037 |
| 211111 |
Petroleum production (ext.) |
037 |
| 211111 |
Recycling plant, gas (ext.) |
037 |
| 211111 |
Repressure plant, oil (ext.) |
037 |
| 211111 |
Rigs, oil or gas well (ext.) |
037 |
| 211111 |
Tank farm, oil field (ext.) |
037 |
| 211111 |
Well, gas (ext.) |
037 |
| 211112 |
Butane production (ext.) |
037 |
| 211112 |
Casing-head butane (ext.) |
037 |
| 211112 |
Casing-head gas (ext.) |
037 |
| 211112 |
Casing-head propane (ext.) |
037 |
| 211112 |
Cycle condensate production (ext.) |
037 |
| 211112 |
Gas compressing (ext.) |
037 |
| 211112 |
Gas cycling plant (ext.) |
037 |
| 211112 |
Gas recycling (ext.) |
037 |
| 211112 |
Gas well rig (ext.) |
037 |
| 211112 |
Gas wells (ext.) |
037 |
| 211112 |
Gasoline casing head (ext.) |
037 |
| 211112 |
Isobutane production (ext.) |
037 |
| 211112 |
Liquefied petroleum gas production (ext.) |
037 |
| 211112 |
Natural gas liquids (i.e., propane, ethane, isobutane, natural gasoline) from field gases (ext.) |
037 |
| 211112 |
Natural gasoline (ext.) |
037 |
| 211112 |
Propane production (ext.) |
037 |
| 211112 |
Sulfur extraction from sour natural gas (ext.) |
037 |
| 21211 |
Cleaning plant, coal (ext.) |
038 |
| 21211 |
Coal breaking (ext.) |
038 |
| 21211 |
Coal cleaning plant (ext.) |
038 |
| 21211 |
Coal colliery (ext.) |
038 |
| 21211 |
Coal crushing plant (ext.) |
038 |
| 21211 |
Coal dredging (ext.) |
038 |
| 21211 |
Colliery (ext.) |
038 |
| 21211 |
Deep coal (ext.) |
038 |
| 21211 |
Dredge coal (ext.) |
038 |
| 21211 |
Drilling coal (ext.) |
038 |
| 21211 |
Open pit, coal (ext.) |
038 |
| 21211 |
Washery, coal (ext.) |
038 |
| 212111 |
Bituminous coal (ext.) |
038 |
| 212111 |
Bituminous coal washery (ext.) |
038 |
| 212111 |
Brown coal mining (ext.) |
038 |
| 212111 |
Brown coal stripping (ext.) |
038 |
| 212111 |
Coal (ext.) |
038 |
| 212111 |
Coal culm bank (ext.) |
038 |
| 212111 |
Coal screening plant (ext.) |
038 |
| 212111 |
Coal strip pit (ext.) |
038 |
| 212111 |
Coal washery (ext.) |
038 |
| 212111 |
Culm bank, coal (ext.) |
038 |
| 212111 |
Culm bank, recovery (ext.) |
038 |
| 212111 |
Hard coal (ext.) |
038 |
| 212111 |
Lignite (ext.) |
038 |
| 212111 |
Lignite stripping (ext.) |
038 |
| 212111 |
Semianthracite (ext.) |
038 |
| 212111 |
Shafts, coal (ext.) |
038 |
| 212111 |
Strip mining, coal (ext.) |
038 |
| 212111 |
Strip pit, coal (ext.) |
038 |
| 212111 |
Stripping coal (ext.) |
038 |
| 212112 |
Coal shafts (ext.) |
038 |
| 212112 |
Coal stripping (ext.) |
038 |
| 212112 |
Coal tipple (ext.) |
038 |
| 212113 |
Anthracite (ext.) |
038 |
| 212113 |
Anthracite breaker (ext.) |
038 |
| 212113 |
Anthracite colliery (ext.) |
038 |
| 212113 |
Anthracite stripping (ext.) |
038 |
| 212113 |
Anthracite washery (ext.) |
038 |
| 212113 |
Breaker, coal (ext.) |
038 |
| 212113 |
Preparation plant, coal (ext.) |
038 |
| 2122 |
Concentrator, metal (ext.) |
039 |
| 2122 |
Mill, concentrating (ext.) |
039 |
| 2122 |
Mill, metal (ext.) |
039 |
| 2122 |
Ore crushing mill (ext.) |
039 |
| 2122 |
Ore dressing mill (ext.) |
039 |
| 2122 |
Ore washer (ext.) |
039 |
| 212210 |
Hematite (ext.) |
039 |
| 212210 |
Iron (ext.) |
039 |
| 212210 |
Iron ore dressing (ext.) |
039 |
| 212210 |
Iron pit (ext.) |
039 |
| 212210 |
Magnetite (ext.) |
039 |
| 212210 |
Metal (ext.) |
039 |
| 212210 |
Mine tailings, metal (ext.) |
039 |
| 212210 |
Open pit, iron (ext.) |
039 |
| 212210 |
Ore beneficating plant (ext.) |
039 |
| 212210 |
Taconite (ext.) |
039 |
| 212210 |
Taconite pellets (ext.) |
039 |
| 212210 |
Washing plant, ore (ext.) |
039 |
| 212221 |
Calaverite (ext.) |
039 |
| 212221 |
Cyanide mill, gold (ext.) |
039 |
| 212221 |
Dredge, gold (ext.) |
039 |
| 212221 |
Flotation mill (ext.) |
039 |
| 212221 |
Gold (ext.) |
039 |
| 212221 |
Gold concentrating (ext.) |
039 |
| 212221 |
Gold dredge (ext.) |
039 |
| 212221 |
Gold lode (ext.) |
039 |
| 212221 |
Gold ore dressing (ext.) |
039 |
| 212221 |
Gold placer (ext.) |
039 |
| 212221 |
Gold stamp mill (ext.) |
039 |
| 212221 |
Lode gold (ext.) |
039 |
| 212221 |
Placer gold (ext.) |
039 |
| 212221 |
Quartz mill, gold (ext.) |
039 |
| 212221 |
Stamp mill, gold or silver (ext.) |
039 |
| 212221 |
Telluride (ext.) |
039 |
| 212222 |
Ball mill, gold (ext.) |
039 |
| 212222 |
Placer mine (ext.) |
039 |
| 212222 |
Silver (ext.) |
039 |
| 212222 |
Silver ore beneficiating plant (ext.) |
039 |
| 212222 |
Silver ore dressing plant (ext.) |
039 |
| 212222 |
Silver stamp mill (ext.) |
039 |
| 212231 |
Calamine (ext.) |
039 |
| 212231 |
Cerrusite (ext.) |
039 |
| 212231 |
Galena (ext.) |
039 |
| 212231 |
Lead (ext.) |
039 |
| 212231 |
Lead and zinc (ext.) |
039 |
| 212231 |
Lead crushing mill (ext.) |
039 |
| 212231 |
Lead ore (ext.) |
039 |
| 212231 |
Lead ore dressing plant (ext.) |
039 |
| 212231 |
Lead zinc ore (ext.) |
039 |
| 212231 |
Sphalerite (ext.) |
039 |
| 212231 |
Willemite (ext.) |
039 |
| 212231 |
Zinc (ext.) |
039 |
| 212231 |
Zinc and lead (ext.) |
039 |
| 212231 |
Zinc blende (ext.) |
039 |
| 212231 |
Zinc lead ore (ext.) |
039 |
| 212231 |
Zinc ore (ext.) |
039 |
| 212231 |
Zinc ore dressing plant (ext.) |
039 |
| 212231 |
Zincite (ext.) |
039 |
| 212234 |
Chalcocite (ext.) |
039 |
| 212234 |
Chalcopyrite (ext.) |
039 |
| 212234 |
Copper (ext.) |
039 |
| 212234 |
Copper concentrating mill (ext.) |
039 |
| 212234 |
Copper concentrator (ext.) |
039 |
| 212234 |
Copper crushing mill (ext.) |
039 |
| 212234 |
Copper milling (ext.) |
039 |
| 212234 |
Copper ore (ext.) |
039 |
| 212234 |
Copper ore dressing plant (ext.) |
039 |
| 212234 |
Copper precipitation (ext.) |
039 |
| 212234 |
Copper stamp mill (ext.) |
039 |
| 212234 |
Cuprite (ext.) |
039 |
| 212234 |
Nickel ore (ext.) |
039 |
| 212234 |
Ore washing plant (ext.) |
039 |
| 212234 |
Precipitation plant, copper (ext.) |
039 |
| 212291 |
Carnotite (ext.) |
039 |
| 212291 |
Pitchblend (ext.) |
039 |
| 212291 |
Radium ore (ext.) |
039 |
| 212291 |
Roscoelite (ext.) |
039 |
| 212291 |
Uranite (ext.) |
039 |
| 212291 |
Uranium ore (ext.) |
039 |
| 212291 |
Vanadium (ext.) |
039 |
| 212299 |
Aluminum (ext.) |
039 |
| 212299 |
Aluminum ore (ext.) |
039 |
| 212299 |
Aluminum precipitation plant (ext.) |
039 |
| 212299 |
Antimony (ext.) |
039 |
| 212299 |
Bauxite (ext.) |
039 |
| 212299 |
Beneficiating plant, metal (ext.) |
039 |
| 212299 |
Beryl (ext.) |
039 |
| 212299 |
Beryllium (ext.) |
039 |
| 212299 |
Cerium ore (ext.) |
039 |
| 212299 |
Chrome (ext.) |
039 |
| 212299 |
Chromite (ext.) |
039 |
| 212299 |
Chromium ore (ext.) |
039 |
| 212299 |
Cinnabar (ext.) |
039 |
| 212299 |
Cobalt (ext.) |
039 |
| 212299 |
Columbite (ext.) |
039 |
| 212299 |
Dressing plant, metal ores (ext.) |
039 |
| 212299 |
Ferberite (ext.) |
039 |
| 212299 |
Huebnerite (ext.) |
039 |
| 212299 |
Ilmenite (ext.) |
039 |
| 212299 |
Manganese (ext.) |
039 |
| 212299 |
Manganite (ext.) |
039 |
| 212299 |
Mercury (ext.) |
039 |
| 212299 |
Microlite (ext.) |
039 |
| 212299 |
Mine recovery work, metal (ext.) |
039 |
| 212299 |
Molybdenite (ext.) |
039 |
| 212299 |
Molybdenum ore (ext.) |
039 |
| 212299 |
Monazite (ext.) |
039 |
| 212299 |
Palladium ore (ext.) |
039 |
| 212299 |
Platinum (ext.) |
039 |
| 212299 |
Platinum ore (ext.) |
039 |
| 212299 |
Pyrolusite (ext.) |
039 |
| 212299 |
Quicksilver (ext.) |
039 |
| 212299 |
Rare earth ore (ext.) |
039 |
| 212299 |
Rhodochrosite (ext.) |
039 |
| 212299 |
Rutile (ext.) |
039 |
| 212299 |
Sludge mill, metal (ext.) |
039 |
| 212299 |
Tantalite (ext.) |
039 |
| 212299 |
Tantalum (ext.) |
039 |
| 212299 |
Thorium ore (ext.) |
039 |
| 212299 |
Tin (ext.) |
039 |
| 212299 |
Tin ore (ext.) |
039 |
| 212299 |
Titanium (ext.) |
039 |
| 212299 |
Titanium ore (ext.) |
039 |
| 212299 |
Tungsten mill (ext.) |
039 |
| 212299 |
Tungsten ore (ext.) |
039 |
| 212299 |
Wolframite (ext.) |
039 |
| 212299 |
Wulfenite (ext.) |
039 |
| 212299 |
Zirconium ore (ext.) |
039 |
| 212311 |
Amesite (ext.) |
047 |
| 212311 |
Argillite (ext.) |
047 |
| 212311 |
Bluestone (ext.) |
047 |
| 212311 |
Flagstone (ext.) |
047 |
| 212311 |
Greenstone (ext.) |
047 |
| 212311 |
Limestone (ext.) |
047 |
| 212311 |
Limestone quarry (ext.) |
047 |
| 212311 |
Marble (ext.) |
047 |
| 212311 |
Marble quarry (ext.) |
047 |
| 212311 |
Mica (ext.) |
047 |
| 212311 |
Nonmetallic mineral drilling (ext.) |
047 |
| 212311 |
Onyx marble (ext.) |
047 |
| 212311 |
Rubble (ext.) |
047 |
| 212311 |
Serpentine (ext.) |
047 |
| 212311 |
Stone crushing (ext.) |
047 |
| 212311 |
Trap rock (ext.) |
047 |
| 212311 |
Travertine (ext.) |
047 |
| 212311 |
Volcanic rock (ext.) |
047 |
| 212312 |
Chalk (ext.) |
047 |
| 212312 |
Dolomite (ext.) |
047 |
| 212312 |
Lime marl (ext.) |
047 |
| 212312 |
Marl (ext.) |
047 |
| 212312 |
Marl pit (ext.) |
047 |
| 212312 |
Whiting (ext.) |
047 |
| 212313 |
Gneiss (ext.) |
047 |
| 212313 |
Granite (ext.) |
047 |
| 212313 |
Plumbago (ext.) |
047 |
| 212319 |
Basalt (ext.) |
047 |
| 212319 |
Bituminous limestone (ext.) |
047 |
| 212319 |
Bituminous sandstone (ext.) |
047 |
| 212319 |
Crushed stone (ext.) |
047 |
| 212319 |
Gabbro (ext.) |
047 |
| 212319 |
Ganister (ext.) |
047 |
| 212319 |
Grits (ext.) |
047 |
| 212319 |
Quartzite (ext.) |
047 |
| 212319 |
Sandstone (ext.) |
047 |
| 212319 |
Slate (ext.) |
047 |
| 212319 |
Stone (ext.) |
047 |
| 21232 |
Chat sand (ext.) |
047 |
| 212321 |
Building sand (ext.) |
047 |
| 212321 |
Dredge, gravel (ext.) |
047 |
| 212321 |
Dredge, sand (ext.) |
047 |
| 212321 |
Gravel (ext.) |
047 |
| 212321 |
Gravel bank (ext.) |
047 |
| 212321 |
Gravel crushing (ext.) |
047 |
| 212321 |
Gravel dredging (ext.) |
047 |
| 212321 |
Gravel pit (ext.) |
047 |
| 212321 |
Gravel screening plant (ext.) |
047 |
| 212321 |
Gravel washing plant (ext.) |
047 |
| 212321 |
Pebble (ext.) |
047 |
| 212321 |
Sand (ext.) |
047 |
| 212321 |
Sand and gravel (ext.) |
047 |
| 212321 |
Sand bank (ext.) |
047 |
| 212321 |
Sand screening plant (ext.) |
047 |
| 212321 |
Sand washing plant (ext.) |
047 |
| 212321 |
Washed sand and gravel (ext.) |
047 |
| 212322 |
Abrasive sand dredge (ext.) |
047 |
| 212322 |
Foundry, sand (ext.) |
047 |
| 212322 |
Glass sand (ext.) |
047 |
| 212322 |
Molding sand (ext.) |
047 |
| 212322 |
Sand crushing (ext.) |
047 |
| 212322 |
Sand dredging (ext.) |
047 |
| 212322 |
Sand mill (ext.) |
047 |
| 212322 |
Sand pit (ext.) |
047 |
| 212322 |
Silica (ext.) |
047 |
| 212322 |
Silica rock (ext.) |
047 |
| 212322 |
Silica sand (ext.) |
047 |
| 212324 |
Ball clay (ext.) |
047 |
| 212324 |
China clay (ext.) |
047 |
| 212324 |
Clay (ext.) |
047 |
| 212324 |
Kaolin (ext.) |
047 |
| 212324 |
Paper clay (ext.) |
047 |
| 212324 |
Rubber clay (ext.) |
047 |
| 212325 |
Andalusite (ext.) |
047 |
| 212325 |
Bentonite (ext.) |
047 |
| 212325 |
Bleaching clay (ext.) |
047 |
| 212325 |
Cornwall stone (ext.) |
047 |
| 212325 |
Cyanite (ext.) |
047 |
| 212325 |
Diaspore (ext.) |
047 |
| 212325 |
Dumortierite (ext.) |
047 |
| 212325 |
Feldspar (ext.) |
047 |
| 212325 |
Fire clay (ext.) |
047 |
| 212325 |
Flint (ext.) |
047 |
| 212325 |
Fuller's earth (ext.) |
047 |
| 212325 |
Kyanite (ext.) |
047 |
| 212325 |
Laterite (ext.) |
047 |
| 212325 |
Magnesite (ext.) |
047 |
| 212325 |
Olivine (ext.) |
047 |
| 212325 |
Pegmatite (ext.) |
047 |
| 212325 |
Pinite (ext.) |
047 |
| 212325 |
Plastic fire clay (ext.) |
047 |
| 212325 |
Refractory mineral (ext.) |
047 |
| 212325 |
Shale (ext.) |
047 |
| 212325 |
Sillimanite (ext.) |
047 |
| 212325 |
Topaz (ext.) |
047 |
| 21239 |
Aggregate (ext.) |
047 |
| 21239 |
Chloride (ext.) |
047 |
| 21239 |
Crocidolite (ext.) |
047 |
| 21239 |
Flourspar ground (ext.) |
047 |
| 21239 |
Rock crushing (ext.) |
047 |
| 212391 |
Alum (ext.) |
047 |
| 212391 |
Borates (ext.) |
047 |
| 212391 |
Borax (ext.) |
047 |
| 212391 |
Colemanite (ext.) |
047 |
| 212391 |
Potash (ext.) |
047 |
| 212391 |
Salines (ext.) |
047 |
| 212391 |
Soda ash (ext.) |
047 |
| 212391 |
Sodium borate (ext.) |
047 |
| 212391 |
Trona (ext.) |
047 |
| 212391 |
Ulexite (ext.) |
047 |
| 212392 |
Phosphate rock (ext.) |
047 |
| 212393 |
Barites (ext.) |
047 |
| 212393 |
Barium (ext.) |
047 |
| 212393 |
Barytes (ext.) |
047 |
| 212393 |
Celestite (ext.) |
047 |
| 212393 |
Fluorite (ext.) |
047 |
| 212393 |
Fluorspar (ext.) |
047 |
| 212393 |
Glaubers salt (ext.) |
047 |
| 212393 |
Guano (ext.) |
047 |
| 212393 |
Lepidolite (ext.) |
047 |
| 212393 |
Lithium mineral (ext.) |
047 |
| 212393 |
Mineral pigment (ext.) |
047 |
| 212393 |
Ocher (ext.) |
047 |
| 212393 |
Pyrites (ext.) |
047 |
| 212393 |
Rock salt (ext.) |
047 |
| 212393 |
Salt (ext.) |
047 |
| 212393 |
Sienna (ext.) |
047 |
| 212393 |
Sulfur (ext.) |
047 |
| 212393 |
Tiff (ext.) |
047 |
| 212393 |
Umber (ext.) |
047 |
| 212399 |
Agate (ext.) |
047 |
| 212399 |
Alabaster (ext.) |
047 |
| 212399 |
Amethyst (ext.) |
047 |
| 212399 |
Anthophyllite (ext.) |
047 |
| 212399 |
Asbestos (ext.) |
047 |
| 212399 |
Asphalt (ext.) |
047 |
| 212399 |
Calcite (ext.) |
047 |
| 212399 |
Calcium carbonate (ext.) |
047 |
| 212399 |
Caliche (ext.) |
047 |
| 212399 |
Catlinite (ext.) |
047 |
| 212399 |
Corundum (ext.) |
047 |
| 212399 |
Cryolite (ext.) |
047 |
| 212399 |
Diamond (ext.) |
047 |
| 212399 |
Diatomaceous earth (ext.) |
047 |
| 212399 |
Diatomite (ext.) |
047 |
| 212399 |
Emery (ext.) |
047 |
| 212399 |
Fill dirt pits (ext.) |
047 |
| 212399 |
Garnet (ext.) |
047 |
| 212399 |
Gem stones (ext.) |
047 |
| 212399 |
Gilsonite (ext.) |
047 |
| 212399 |
Graphite (ext.) |
047 |
| 212399 |
Grinding peat (ext.) |
047 |
| 212399 |
Grindstone (ext.) |
047 |
| 212399 |
Gypsite (ext.) |
047 |
| 212399 |
Gypsum (ext.) |
047 |
| 212399 |
Industrial diamond (ext.) |
047 |
| 212399 |
Jade (ext.) |
047 |
| 212399 |
Millstone (ext.) |
047 |
| 212399 |
Muscovite (ext.) |
047 |
| 212399 |
Natural asphalt (ext.) |
047 |
| 212399 |
Oilstones (ext.) |
047 |
| 212399 |
Ozokerite (ext.) |
047 |
| 212399 |
Paint ore (ext.) |
047 |
| 212399 |
Peat (ext.) |
047 |
| 212399 |
Peat bog (ext.) |
047 |
| 212399 |
Peat grinding (ext.) |
047 |
| 212399 |
Peat humus (ext.) |
047 |
| 212399 |
Peat moss gathering (ext.) |
047 |
| 212399 |
Peat screening plant (ext.) |
047 |
| 212399 |
Peat shredding (ext.) |
047 |
| 212399 |
Perlite (ext.) |
047 |
| 212399 |
Phlogopite (ext.) |
047 |
| 212399 |
Pipestone (ext.) |
047 |
| 212399 |
Plaster (ext.) |
047 |
| 212399 |
Precious stones (ext.) |
047 |
| 212399 |
Pulpstone (ext.) |
047 |
| 212399 |
Pumice (ext.) |
047 |
| 212399 |
Pumicite (ext.) |
047 |
| 212399 |
Pyrophyllite (ext.) |
047 |
| 212399 |
Quarry (ext.) |
047 |
| 212399 |
Quartz (ext.) |
047 |
| 212399 |
Quartz crystal (ext.) |
047 |
| 212399 |
Reed peat (ext.) |
047 |
| 212399 |
Rubbing stone (ext.) |
047 |
| 212399 |
Ruby (ext.) |
047 |
| 212399 |
Sapphire (ext.) |
047 |
| 212399 |
Scythestone (ext.) |
047 |
| 212399 |
Semiprecious stones (ext.) |
047 |
| 212399 |
Soapstone (ext.) |
047 |
| 212399 |
Spar (ext.) |
047 |
| 212399 |
Talc (ext.) |
047 |
| 212399 |
Tremolite (ext.) |
047 |
| 212399 |
Tripoli (ext.) |
047 |
| 212399 |
Turquoise (ext.) |
047 |
| 212399 |
Uintaite (ext.) |
047 |
| 212399 |
Vermiculite (ext.) |
047 |
| 212399 |
Volcanic ash (ext.) |
047 |
| 212399 |
Whetstone (ext.) |
047 |
| 212399 |
Wurtzilite (ext.) |
047 |
| 213111 |
Drilling gas wells (ext.) |
049 |
| 213111 |
Drilling oil wells (ext.) |
049 |
| 213111 |
Drilling, water intake, wells (ext.) |
049 |
| 213111 |
Gas well casing pulling (ext.) |
049 |
| 213111 |
Gas well drilling (ext.) |
049 |
| 213111 |
Natural gas well drilling (ext.) |
049 |
| 213111 |
Off shore drilling (ext.) |
049 |
| 213111 |
Oil casing pulling (ext.) |
049 |
| 213111 |
Oil derrick construction (ext.) |
049 |
| 213111 |
Oil drilling (ext.) |
049 |
| 213111 |
Oil well cementing (ext.) |
049 |
| 213111 |
Oil well cleaning (ext.) |
049 |
| 213111 |
Oil well drilling (ext.) |
049 |
| 213111 |
Oil well log service (ext.) |
049 |
| 213111 |
Oil well swabbing (ext.) |
049 |
| 213111 |
Petroleum exploration (ext.) |
049 |
| 213111 |
Well drilling, service oil (ext.) |
049 |
| 213112 |
Acidizing oil wells (ext.) |
049 |
| 213112 |
Bailing wells (ext.) |
049 |
| 213112 |
Cementing oil wells (ext.) |
049 |
| 213112 |
Cleaning oil wells (ext.) |
049 |
| 213112 |
Contract services, oil (ext.) |
049 |
| 213112 |
Diamond drilling, oil (ext.) |
049 |
| 213112 |
Dismantling oil rigs (ext.) |
049 |
| 213112 |
Electrical logging oil wells (ext.) |
049 |
| 213112 |
Electrical well logging co. (ext.) |
049 |
| 213112 |
Erecting lease tanks, oil field (ext.) |
049 |
| 213112 |
Exploration services, exc. geological for mining (ext.) |
049 |
| 213112 |
Exploration, oil and gas field (ext.) |
049 |
| 213112 |
Gas exploration service (ext.) |
049 |
| 213112 |
Gas field exploration (ext.) |
049 |
| 213112 |
Gas field services (ext.) |
049 |
| 213112 |
Gas well rig dismantling (ext.) |
049 |
| 213112 |
Gas well rig repairing (ext.) |
049 |
| 213112 |
Gun perforating service, oil (ext.) |
049 |
| 213112 |
Logging oil wells (ext.) |
049 |
| 213112 |
Magnetic testing oil service (ext.) |
049 |
| 213112 |
Mud chemical service co. (ext.) |
049 |
| 213112 |
Mud service co. (ext.) |
049 |
| 213112 |
Oil cycling plant (ext.) |
049 |
| 213112 |
Oil exploration service (ext.) |
049 |
| 213112 |
Oil field (ext.) |
049 |
| 213112 |
Oil field casing (ext.) |
049 |
| 213112 |
Oil field chemical service co. (ext.) |
049 |
| 213112 |
Oil field drilling (ext.) |
049 |
| 213112 |
Oil field services (ext.) |
049 |
| 213112 |
Oil field warehouse (ext.) |
049 |
| 213112 |
Oil perforating service (ext.) |
049 |
| 213112 |
Oil rig construction (ext.) |
049 |
| 213112 |
Oil rig repair service (ext.) |
049 |
| 213112 |
Oil rigs (ext.) |
049 |
| 213112 |
Oil sampling service (ext.) |
049 |
| 213112 |
Oil structure locating service (ext.) |
049 |
| 213112 |
Oil well acidizing (ext.) |
049 |
| 213112 |
Oil well casing pulling (ext.) |
049 |
| 213112 |
Oil well chemical service (ext.) |
049 |
| 213112 |
Oil well plugging (ext.) |
049 |
| 213112 |
Oil well recycling (ext.) |
049 |
| 213112 |
Oil well rig construction (ext.) |
049 |
| 213112 |
Oil well rig dismantling (ext.) |
049 |
| 213112 |
Oil well rig repairing (ext.) |
049 |
| 213112 |
Oil well servicing co. (ext.) |
049 |
| 213112 |
Oil well shooting (ext.) |
049 |
| 213112 |
Oil well surveying (ext.) |
049 |
| 213112 |
Oil well testing (ext.) |
049 |
| 213112 |
Ore sampling service (ext.) |
049 |
| 213112 |
Perforating service, oil (ext.) |
049 |
| 213112 |
Perforating well casings (ext.) |
049 |
| 213112 |
Petroleum field service (ext.) |
049 |
| 213112 |
Pipe testing, oil field service (ext.) |
049 |
| 213112 |
Plugging oil wells (ext.) |
049 |
| 213112 |
Pulling oil well casing (ext.) |
049 |
| 213112 |
Repair lease tanks, oil field (ext.) |
049 |
| 213112 |
Rig building, gas wells (ext.) |
049 |
| 213112 |
Rig building, oil wells (ext.) |
049 |
| 213112 |
Rigging co., oil field (ext.) |
049 |
| 213112 |
Salt water disposal co. (ext.) |
049 |
| 213112 |
Salt water impounding, oil (ext.) |
049 |
| 213112 |
Seismograph service co. (ext.) |
049 |
| 213112 |
Servicing oil wells (ext.) |
049 |
| 213112 |
Shooting oil wells, contract (ext.) |
049 |
| 213112 |
Shot hole drilling (ext.) |
049 |
| 213112 |
Sonoscope oil well service (ext.) |
049 |
| 213112 |
Surveying, oil wells (ext.) |
049 |
| 213112 |
Swabbing oil wells (ext.) |
049 |
| 213112 |
Well abandoning (ext.) |
049 |
| 213112 |
Well drilling, oil or gas (ext.) |
049 |
| 213112 |
Well foundation grading, oil or gas (ext.) |
049 |
| 213112 |
Well logging (ext.) |
049 |
| 213112 |
Well plugging (ext.) |
049 |
| 213112 |
Well pumping (ext.) |
049 |
| 213112 |
Well servicing (ext.) |
049 |
| 213113 |
Blasting services for mining (ext.) |
049 |
| 213113 |
Contract services, coal (ext.) |
049 |
| 213113 |
Drilling services for mining (ext.) |
049 |
| 213113 |
Mining support services (i.e., blasting, drilling, tunneling, overburden removal) (ext.) |
049 |
| 213113 |
Overburden removal services (ext.) |
049 |
| 213113 |
Removal of overburden services (ext.) |
049 |
| 213114 |
Boring test holes for mining (ext.) |
049 |
| 213114 |
Contract services, metal (ext.) |
049 |
| 213114 |
Drilling service, wells (ext.) |
049 |
| 213114 |
Exploration metal (ext.) |
049 |
| 213114 |
Metal mining services (ext.) |
049 |
| 213114 |
Strip mining, metal (ext.) |
049 |
| 213114 |
Stripping metal (ext.) |
049 |
| 213114 |
Test drilling services for mining (ext.) |
049 |
| 213115 |
Drilling, nonmetallic mineral (ext.) |
049 |
| 213115 |
Exploration, nonmetallic mineral, exc. fuel (ext.) |
049 |
| 213115 |
Mineral exploration co. (ext.) |
049 |
| 213115 |
Seismographic exploration service (ext.) |
049 |
