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countersink
➞
➞
countershear
countershock
countersign
countersignature
countersink
countersink (drill)
countersink bolt
countersink depth
countersink drill
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countersink
➞
countersink
Definitions
[1]
vt.
钻孔装埋, 打埋头孔于
[2]
n.
埋头孔, 锥口钻
[3]
[机]
锥坑
countersink
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