machine screw countersink的意思|示意
美 / /
英 / /
机器螺丝沉槽
machine screw countersink的网络常见释义
机用螺钉沉孔 ... machine screw countersink机用螺钉沉孔,安装螺钉沉孔 countersink for wood working木工锥口钻 sole cutting edge countersink单刃锥口钻 ...