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金屬覆蓋層 工程用金和金合金電鍍層

Metallic coatings-Electrodeposited gold and gold alloy coatings for engineering purposes
標準號:SJ/T 11104-1996
Metallic coatings-Electrodeposited gold and gold alloy coatings for engineering purposes
標準號:SJ/T 11104-1996