题目内容
(请给出正确答案)
[单选题]
在研磨气门时,当气门座锥面中间环带出现()宽的均匀连续的接触带,即可认为研磨合格。
A.0.5~1.5mm
B.1.5~2.5mm
C.1~2mm
D.2.5~3.5mm
答案
查看答案
A.0.5~1.5mm
B.1.5~2.5mm
C.1~2mm
D.2.5~3.5mm