“离开刹把时，用链子将刹把锁住”的英文表述正确的是(?????)。(???)

“离开刹把时，用链子将刹把锁住”的英文表述正确的是(?????)。(???)

A.On trips.use safety clamp on all drill collars and all flushjoint pipe,and on any bottomhole assembly tools

B.Prior to trip inspect the drawworks brakes.brakelinkage,auxiliary brake and emergency driveclutch to

C.While installing or removing the drill collar clamp.hold weight of string with blocks

D.When leaving drawworks break handle position.alwayschain down brake handle

正确答案是D