英文關鍵字
auger
bakken
basin
bit
boer
borer
carving
caving
clay
claystone
coal
cutting
dakota
derrick
dirt
drill
driller
drilling
employee
energy
equipment
exploration
explore
fields
flow
fluid
fluids
frack
fracking
fractionating
fracturing
fuel
gas
geological
grate
grease
helicopter
holer
hydraulic
industrial
industry
install
installing
laborer
limestone
lubricant
lubrication