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我们厂有一种产品,上面的一个零件是外径850毫米的大圆环(图1)。这个零件最后要镀镍,而且使用上要承受大的压力,因此必须锻成整体,才
Our factory has a product, the top of a part is a large ring 850 mm in diameter (Figure 1). This part is finally nickel-plated, and the use of the pressure to bear, it must be forged only before