英文關鍵字
boring
construction
down
drilling
engine
geology
hydraulic
hydraulics
industry
machine
motor
panorama
power
reducer
rig
rotary
rotation
well
work
英文關鍵字
boring
construction
down
drilling
engine
geology
hydraulic
hydraulics
industry
machine
motor
panorama
power
reducer
rig
rotary
rotation
well
work