中铬钢球晶粒细化硬度均匀可实地考察工厂汉祥

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Xuzhou hanxiang precision parts ltd

Address:West side of the canal road in the economic development area of xuzhou city
Tel:17351925888

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17351925888

中铬钢球 晶粒细化硬度均匀 可实地考察工厂 汉祥