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有哪位大侠知道ZG42CrMn的化学成分?
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2020-08-31 15:32
有哪位大侠知道ZG42CrMn的化学成分?
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2020-08-31 15:32
你好碳:0.39-0.47锰:0.9-1.2硅:0.17-0.37铬:0.9-1.2
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