简述工艺规程的种类。
参考答案:
机械加工工艺过程卡片;机械加工工序卡片;机械加工工艺(综合)卡片。
The beach is ______ walking distance of my house. That is to say, we can walk there easily.[ ]
A. for
B. on
C. beyond
D. within
清扫器应工作平稳,不应有卡带或()现象。
A、脱落;
B、松动;
C、刮带;
D、翘边。