为了找到答案，他把一定长度的钓鱼线穿过锡罐的小孔，然后把这个锡罐固定到机动的草坪修边器的旋转部位。

To find out, he placed lengths of fishing line through holes in a tin can. He attached the can to the spinning part of a motorized grass edger.

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介绍了热水器外壳顶盖类薄壁筒体件垂直成形修边模及其工作过程，模具调试时出现的问题及解决方案。

The work process of the trimming die for vertically forming the thin-wall barrels of the shell top part of hot-water shower device was introduced.

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分析了消声器隔板的成形工艺，在两次拉伸工序中间增加修边工序，从而保证了零件的成形尺寸。

The forming process for the insulation plate of the muffler was analyzed. The trimming operation was added between the two times of drawing to ensure the forming dimensions of the part.

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