절삭온도에 관한 설명 중 틀린 것은?① 가공물의 경도가 높을수록

절삭온도에 관한 설명 중 틀린 것은?
① 가공물의 경도가 높을수록 높아진다.
② 온도가 높아지면 공구수명이 단축된다.
③ 공구와 공작물의 마찰이 적을수록 높아진다.
④ 온도가 상승하면 열팽창으로 인해 치수변화가 발생된다.

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Regarding the description of the wrong temperature?① the higher the hardness of workpiece. ② temperature increases tool life. ③ the less friction increases tool and workpiece. ④ If the temperature rise due to thermal expansion is the dimension change occurs.

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The wrong of the description of the cutting temperature?
① higher the higher the hardness of the workpiece.
② The elevated temperatures tool life is shortened.
③ becomes higher the smaller the friction of the tool and workpiece.
④ when the temperature rises due to thermal dimensional changes it is generated.

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cutting temperature in the description of the error.① processing water hardness is higher and higher.if the temperature is too high, ② to shorten the tool life.③ tool and the work of less friction and higher.④ temperature rise, thermal expansion and contraction due to changes in size.

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