这个旧式的衬里有一个闪光的青铜表面。

The former lining has a shiny copper bronze finish.

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文物：秦青铜三棱箭镞，表面经过特殊防锈处理，形制规整划一。

Triangular Bronze Arrowhead of Qin Dynasty: Its surface received special antirust treatment and it has a neat shape.

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在铍青铜合金上电镀铝，需在镀铝前作特殊的表面活化处理，镀铬时也有不同于钢铁件镀铬的操作方法。

Special treatment is recommended to activate beryllium copper surface before chromium plating. And special steps which differ from conventional chromium plating on steel parts are to be taken.

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