sinking winder是什么意思

网络释义

1)sinking winder,凿井用提开机2)sinking hoist,凿井提升机3)sinker drill,凿井用凿岩机4)wet sinker drill,凿井用湿式钻机5)shaft sinking drill,凿井用大钻机6)collar excavation,井颈开凿