Its technological process is as follows: cutting sheet material, punching slugs, high-frequency welding to form circular cylinder, local annealing at the portion to be flanged, bending, flanging and rounded edge capping.
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cutting sheet material
裁片材料
以上为机器翻译结果，长、整句建议使用 人工翻译 。
A device for cutting ovals or circles in sheet material.
为椭圆或圆形切割的板材设备。
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