活塞环安装入活塞后,应有一定的侧隙,侧隙的大小可用()来检查。
A 游标卡尺
B 塞尺
C 千分尺
D 内径千分尺
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“-”符号表示形位公差中的()误差。
A 面轮廓度
B 线轮廓度
C 圆度
D 直线度
以下选项不属铣床试运行前的准备工作内容的是()。
A 主轴轴承的精度检查
B 电气装置的清洁、紧固
C 丝杆的清洗
D 润滑油的油质检查