短語詞組短語Drill -stem subs 鑽柱轉(zhuǎn)換接頭drill -stem m tester 鑽桿測試器drill l stem 鑽桿drill stem buckling 鑽柱彎曲drill stem bushing 方鑽桿補(bǔ)心drill stem test method 中途測試工具法 返回 drill stem