BS 7371-4-1994 金属紧固件涂层.第4部分电镀镍、镍铬和铜镍铬涂层规范. Coatings on metal fasteners - Specification for electropl
标准简介
BS 7371-4-1994 金属紧固件涂层.第4部分电镀镍、镍铬和铜镍铬涂层规范. Coatings on metal fasteners - Specification for electroplated nickel,
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