... 二点弯折 two point depression 板材的弯折 dings 弯折辊 flexingroll ...
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公知水箱模块都是预先在板材的角部剪掉一块，然后弯折、焊接。
Any water tank module in the prior art is processed through cutting a piece off the corner of a piece of sheet metal first, and then bending and welding.
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