Construction of buildings; drilling of deep oil or gas-wells; drilling of wells; mining extraction; rental of construction equipment; quarrying services; pipeline construction and maintenance; factory construction; machinery installation, maintenance and repair

'build':3 'construct':1,19,24,28 'deep':6 'drill':4,12 'equip':20 'extract':16 'factori':27 'gas':10 'gas-wel':9 'instal':30 'machineri':29 'mainten':26,31 'mine':15 'oil':7 'pipelin':23 'quarri':21 'rental':17 'repair':33 'servic':22 'well':11,14

Anthracite; coke; mineral motor fuel; oil-gas, namely, fuel gas, gasses for use as fuel, natural gas; petroleum, raw or refined; carburants, namely, fuels with an alcoholic base, fuel for motor vehicles in the nature of gasoline and diesel, fuels from biological sources; lignite; coal; coal briquettes

'alcohol':28 'anthracit':1 'base':29 'biolog':43 'briquett':48 'carbur':23 'coal':46,47 'coke':2 'diesel':40 'fuel':5,10,16,25,30,41 'gas':8,11,18 'gasolin':38 'gass':12 'lignit':45 'miner':3 'motor':4,32 'name':9,24 'natur':17,36 'oil':7 'oil-ga':6 'petroleum':19 'raw':20 'refin':22 'sourc':44 'use':14 'vehicl':33

Conducting geological surveys; geological research; geological prospecting

'conduct':1 'geolog':2,4,6 'prospect':7 'research':5 'survey':3

BLACKSPACE

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