The qualification of such a test is only valid for the process sequence carried out during the multiprocess procedure test.

对这样一个试验鉴定仅对多种焊接工艺试验所行过有效。

The article has described the structure and working principle of multiprocess composite die for automobile deafener closure.

介绍了汽车消声器隔板多工冲压复合模具结构、工作原理。