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   English ⇄
Google | Forvo | +
rotary kelly bushing
dril. 转盘补心; 补心海拔; 方补心
earth.sc. 转盘方钻杆补心
oil 转盘方补心
 English thesaurus
rotary kelly bushing
O&G. tech. RKB (MichaelBurov)

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