The zinc plating could be used as bottom of chemical nickel plating and could deposit other protecting decorating metal coating layer on it.
所得锌镀层可 以作为化学镀镍的底层，也可以在其上沉积其它防护装饰性金属镀层。
In order to make the hearth and hearth bottom have the same life-span as that of blast furnace, one of effective measures is to form a layer of slag-metal skull on the hearth and hearth bottom.
实现高炉炉缸、炉底与高炉寿命同步的措施之一就是在高炉炉缸和炉底冻结一层渣铁壳。
A bottom layer of metal is attached between the braking face and the ceramic coating.
于所述刹车面与陶瓷涂层之间还附着有一金属底层。
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