出典:Wikipedia
出典:『Wikipedia』 (2011/05/01 13:55 UTC 版)
A countersink is a conical hole cut into a manufactured object, or the cutter used to cut such a hole. A common usage is to allow the head of a countersunk bolt or screw, when placed in the hole, to sit flush with or below the surface of the surrounding material. (By comparison, a counterbore makes a flat-bottomed hole that might be used with a hex-headed capscrew.) A countersink may also be used to remove the burr left from a drilling or tapping operation thereby improving the finish of the product and removing any hazardous sharp edges.
ねじらせる
to bring anything to a conclusion
to dispose of anything―get rid of anything―despatch one's business―make an end of one's business
to dispose of a matter―get rid of anything―despatch one's business―make an end of one's business―settle a matter―finish one's work―get through with one's task―bring a matter to a termination―bring a matter to a conclusion
雷同する
接骨する
凝立する
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