May assist skilled trades persons with installation and repair of plant machinery.

可协助熟练技工安装和维修工厂机器。

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This unit group includes trades persons and related skilled workers, not elsewhere classified, who repair, service, install, calibrate or fabricate a variety of products.

此单元组包括技工和其他未分类的相关技术工人，他们负责维修，服务，安装，校准或制造各种产品。

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Objective To made follow-up observations on HBV infection in persons from catering and service trades.

目的为了解泰安市饮食服务业从业人员乙型肝炎病毒感染状况。

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