试题详情

检修汽封时用贴胶布法测量汽封间隙时,如果第三层胶布磨光而第二层胶布刚见红时,则汽封间隙为( )

A大于0.75mm

B0.65~0.70mm

C0.55~0.60mm

D0.45~0.50mm