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有害作业物质
environ. hazardous working material A poison, corrosive agent, flammable substance, explosive, radioactive chemical, or any other material which can endanger human health or well-being if handled improperly (一种有毒的、有腐蚀性的介质、易燃物、易爆物、放射性化学品或其他任何若处理不当则可危及人类健康或福祉的物质。)