人造宝石的定义是由人工制造且自然界无已知对应物的晶质体、非晶质体或结合体。
目的调查人造宝石厂和天然宝石厂粉尘危害情况。
Objective To survey the hazardous impact of gem dust on the health of workers.
目的调查某大型人造宝石加工厂工人矽肺的发病特征。
Objective To understand the working environment of gem-worker and the occurrence figures of silicosis among these workers.
多年来公司的主营各种规格及形状的人造宝石深受市场欢迎。
Over the years the company's main variety of specifications and shapes of the artificial gems received by the market.
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