对本市下水管理所下水维修疏浚工 ,在污水管道内疏浚作用及井内检修作业劳动条件 ,进行了卫生学调查。1　概况该所有职工 2 5名 ,其中管道维修疏浚工 18名 ,负责全市城区方圆 8.5平方公里内 ,纵横 140多公里长的污水管道系统 ,及 70 0 0多个阴井进行维护疏通。疏浚作业以人工操 Hygienic investigations were carried out on the dredging workers in the sewer launching works in the city, the dredging works in the sewer pipes, and the working conditions of overhaul operations in the wells. 1 Overview All 25 workers, of whom 18 are pipeline maintenance dredgers, responsible for the city’s urban area of ​​8.5 square kilometers within a length of more than 140 kilometers long sewer system, and more than 70,000 Yin wells for maintenance to clear. Dredging operations to artificial operations