英文關鍵字
bridle
counterweight
crank
crankshaft
day
downhole
economics
extraction
field
gas
gasoline
horsehead
mining
money
motion
oil
oiler
petroleum
produce
pump
pumpjack
rig
station
summer
well
wireline
英文關鍵字
bridle
counterweight
crank
crankshaft
day
downhole
economics
extraction
field
gas
gasoline
horsehead
mining
money
motion
oil
oiler
petroleum
produce
pump
pumpjack
rig
station
summer
well
wireline