单项选择题
A、0.5～0.7mm B、0.6～0.8mm C、0.55～0.75mm D、0.65～0.75mm
A、3min B、4min C、7min D、5min
A、滚动轴承 B、滑动 C、推动 D、含油
A、0.24～0.37mm B、0.22～0.45mm C、0.20～0.31mm D、0.20～0.45mm
微信扫一扫,加关注免费搜题
