EPA personnel wearing Level A personal protective clothing and equipment for air monitoring and hazardous waste sampling. (Image courtesy of U.S. Environmental Protection Agency.
EPA personnel wearing Level A personal protective clothing and equipment for air monitoring and hazardous waste sampling. (Image courtesy of U.S. Environmental Protection Agency.
EPA人员穿著A级防护衣与装备，对危险废弃物样本进行空气检测。（美国环境保护局摄。）