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附图的輪軸是机引五鏵犁和机引三鏵犁上的一个很重要的零件,用6钢制造,弯曲部分必須进行热处理,要求硬度达布氏300～450范围
The wheel axle of the drawing is a very important part on the machine that leads to the five-plow plow and the machine-driven three-plow plow and is made of 6 steel. The curved part must be heat-treated and requires a hardness of 300 to 450