英文關鍵字
bit
boer
borer
drill
driller
drilling
employee
energy
equipment
fluid
fuel
grease
holer
install
installing
laborer
lubricant
lubrication
machine
men
mud
new
oil
oilfields
operator
penetration
petrol
petroleum
pipe
rig
rotate
setting
slippery
slush
technology
thread
top
uger
well
wellhead
winter
worker
workman