- 穿孔: bore a hole; punch a hole; p ...
- 顶头: coming directly towards one ...
- 顶头: 1.(迎面) coming directly towards one2.(末端) top; end 这条胡同的顶头有一家商店。 there is a shop at the end of this lane.; 顶头风 head wind; 顶头缝 head joint; 顶头盖 back; 顶头浪 head-sea
- 内锥孔顶尖: the parts and units of jigs and fixtures―inner taper hole centre
- 排气孔顶盖: vent cap
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