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油柜法兰如图1所示。以前,我厂一直采用热弯工艺。热弯成的法兰内侧面皱折大,不圆整,产品质量低劣。而且能耗大,劳动强度
Oil tank flange shown in Figure 1. Previously, our factory has been using hot bending process. Hot bending into the flange side of the big wrinkles, not rounded, poor product quality. And energy consumption, labor intensity