Shutting up the cold curved type steel can't avoid the empty curving, not only curved on the side but also pressed on the top by roller.
闭口冷弯型钢不可避免存在空弯，辊型构成除侧曲外还要加上压辊。
Shutting up the cold curved type steel can't avoid the empty curving, not only curved on the side but also pressed on the top by roller.
闭口冷弯型钢不可避免存在空弯，辊型构成除侧曲外还要加上压辊。
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