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总则:本标准适用于加稀土-镁球化剂。球墨铸铁件之技术条件。 一、球墨铸铁的机械性能规定如表1。
General: This standard applies to adding rare earth-magnesium sphering agent. The technical conditions of ductile iron castings. First, the mechanical properties of ductile iron are shown in Table 1.