英文關鍵字
petroleum
installing
sample
explore
well
flow
exploration
gas
motor
rig
laborer
petrol
oil
return
offshore
drilling
helicopter
install
technological
industrial
sand
lubricant
hydraulic
pit
drill
dirt
mud
industry
coal
technology
geological
carving
sandstone
based
shaker
limestone
grate
heavy
lubrication
caving
clay
cutting
shale
water
claystone
fluids
holer
oilrig
silt