英文關鍵字
casing
collars
couplings
drilling
energy
equipment
geological
heavy
immersion
industries
lowering
machinery
oil
petroleum
pipe
pontoon
production
rig
rotary
rusty
technology
thread
英文關鍵字
casing
collars
couplings
drilling
energy
equipment
geological
heavy
immersion
industries
lowering
machinery
oil
petroleum
pipe
pontoon
production
rig
rotary
rusty
technology
thread