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华北油田是集石油开采、贮运、炼制及石油化工为一体的大型石化企业。在工作中接触多种有毒物质，为了掌握职工接触毒物作业危害的实际情况，我们对所有有毒作业岗位进行了有毒作业分级调查，现将结果报告如下。１ 对象与方法１－１ 对象：根据既往监测资料，以华北油田各二?
Huabei Oilfield is a large-scale petrochemical enterprise integrating oil exploration, storage and transportation, refining and petrochemicals. In the work of exposure to a variety of toxic substances, in order to grasp the actual exposure of workers exposed to toxic hazards, we conducted a toxic grade classification of all toxic jobs, the results are reported as follows. 1 objects and methods 1-1 Object: According to the previous monitoring data to the North China Oilfield two?