最初小金人是个铜像，有一段时间由塑料做成，而今天则用金属铝镀金而成。
Initially he was solid bronze; for a while plaster and today gold-plated, a metal alloy.
提出了对塑料表面镀金工艺还需深入研究的几个方面。
Some aspects that need to be deeply studied on electroless gold plating for engineering plastics were put forward.
电磁屏蔽材料常用的导电填料有各类金属、 非金属的粉末或纤维以及镀金属纤维等，常用的基体材料可以是橡胶、 塑料、纤维。
The fillers usually used for EMS materials were metal fibres or powders and nonmetal fibres or powders and metal coated fibres. The bases for EMS materials were always rubber, resin and fibre.
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