Objective To study the epidemiological features in harmfuldust workplaces and silicosis in gem processing workers (GWS) in Guangdong.
目的摸清广东省宝石加工工作场所粉尘危害和宝石加工工人矽肺(GW S)的发病特征。
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Safe and harmless: fiber cement flat without any harmful radiation, theprocess of using no harmfuldust, and therefore can be used in a variety of buildings.
安全,无害:纤维水泥平板没有任何有害辐射,使用过程也没有有害粉尘,因此可广泛用于各种建筑物中。
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The suit also protects them from harmful radiation and fast-moving space dust.