第一层包覆所述金属芯的外表面,并且通过从包含铜离子的第一浴 中电镀铜或铜合金产生。
The first layer encases the eternal surfaces of the metallic core and is produced by electroplating copper or copper alloy from a first bath containing copper ions.
这些是第一批的浴塘印文。
瓦房店市仙浴湾俄罗斯鲟鱼人工养殖基地,系大连市第一个国家级农业引智成果推广示范基地。
The sturgeon farming base , xianyu bay , wafangdian city , is the first state - level introducing and popularizing centre of agricultural engineering in dalian.
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