轴箱按轴承种类分为()、滚动轴承轴箱。
参考答案:滑动
Not only ______ prepare lunch for us, but also _______ clothes for us.
A.he did , he washed
B.he did , did he wash
C.did he , he washed
D.did he, did he wash
分油机日常检查中对分油盆主要检查()。
A.是否泄漏
B.是否存在异常振动和噪声
C.是否过热
D.盆叠的压力如何