Glass, it acquires its colour by the addition of metallic oxides to molten Glass.
借由加入氧化物以熔化金属的过程获得颜色。
2
The addition of a small amount of metallic elements in pure aluminium would change its electrochemical activity, enhance its anticorrosive performance and decrease its negative differential effect.
向纯铝中加入少量金属元素，能改变铝的电化学活性，增强其抗腐蚀性能，减小负差效应。
3
If the surface contains rust, which should be in advance cleaned away by metallic brush, in addition to, can also wipe the surface.