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質量保證

標準規范

質量承諾

灰件鑒定方法

質量承諾

一個瑪鋼灰件（雙標）獎1618元
灰件鑒定標準：變形率1’以下低于5%，1 1/4-2’低于4%，2 1/2--4’低于3%，有裂紋的為灰件。

一個透孔瑪鋼獎500元
注：1、英制標記。2、廢品鑒定標準：合理安裝和檢測，漏水漏氣為廢品件。
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