The former is very simple ma-thematically. But it artificially extends the capacity of vertical mixture.
前者数学运算简单，但人为地扩大了垂直混合能力。
Bulk electrical switches suitable for prefabricated copper and aluminum bus industry, with flat curved, vertical bending, punching, shearing, press Ma, flattening, bending and so on.
适合用于电气开关行业批量预制铜铝母线，具有平弯、立弯、冲孔、剪断、压麻点、矫平、弯管等功能。
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