轴上零件作周向固定的目的:是为了保证()转矩时,轴上零件与轴之间不产生()。
参考答案:传递;相对转动
用所给的单词的适当形式填空。
1. I _____ (see) a car strike the tree last Sunday.
2. Everyone _____ (read) the book loudly.
3. We could all study about _____ (garden ) this winter.
4. I enjoyed _____ (Jenny) hobby best.
更换风口或渣口各套时有哪些注意事项?