结合已设计出的45～76焊管生产线中的六辊矫直机，阐明了矫直辊辊型设计的一种方法。
The paper, combined with the 45~76 straightening machine designed, provides a theoretical method for designing the straightening roll camber.
结合实例介绍了箱体断裂的大型减速机的修复措施。对可焊性进行了分析；对补焊工艺作了详细说明。
Repair measures of large reducer with housing cracking are introduced by examples. Analysis is carried out on weldability. Detailed description is done on repair welding technology.
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