短語(yǔ)詞組短語(yǔ)Drill -stem subs 鉆柱轉(zhuǎn)換接頭drill -stem m tester 鉆桿測(cè)試器drill l stem 鉆桿drill stem buckling 鉆柱彎曲drill stem bushing 方鉆桿補(bǔ)心drill stem test method 中途測(cè)試工具法 返回 drill stem