当冲裁件质量要求较高时，在合理的间隙范围内，取大值。
查看答案
冲裁间隙较小时，冲裁件的断面质量相对较好。
A. 对
B. 错
级进冲裁模是在压力机的一次行程中，在同一工位上完成多种工序的冲裁模。
A. 对
B. 错
冲裁凸、凹模的工作端部要求有光滑的圆角。
A. 对
B. 错
Have you got enough information about their talk? Listen to the conversation again and choose the correct answers to the questions below.(6 ) How long does George Chen work in the company?
A.For several years.
B.Only for a short time.
C.He is fresh out of college.
D.Not mentioned.
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