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。
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。
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。
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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