절삭유(cutting fluids)의 사용 목적에 관한 설명 중

절삭유(cutting fluids)의 사용 목적에 관한 설명 중 틀린 것은?
① 공구의 인선을 냉각시켜 공구의 경도저하를 방지한다. ② 가공물을 냉각시켜 열에 의한 정밀도 저하 방지한다. ③ 칩(chip)을 씻어주고 가공표면을 양호하게 한다. ④ 안내면(slide way)에 윤활작용을 한다.

Results (English) 1:

Coolant (cutting fluids) regarding the intended use of the description of the wrong one?① the hardness of the tool cools down the line due to degradation of the tool. ② precision of the column cools the workpiece to prevent degradation. ③ chip (chip) processing of surfaces in good condition to give a wash. ④ Guide (slide way) lubrication.

Results (English) 2:

It is of the wrong information on the use object of the coolant (cutting fluids)?
① to prevent hardness reduction in the tool to cool the cutting edge of the tool. ② to prevent precision degradation caused by cooling the workpiece column. ③ washed chips (chip) and to improve the machining surface. ④ The lubrication on the guide surface (slide way).