Copper plates are imported from Japan,pure silver ingots for plating from Switzerland,and argentic salt and other chemicals from Germany.
日本进口的铜片，镀银的瑞士纯银条，西德的银监及化工原料等等。
Copper plates are imported from Japan,pure silver ingots for plating from Switzerland,and argentic salt and other chemicals from Germany.
日本进口的铜片，镀银的瑞士纯银条，西德的银监及化工原料等等。
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