兰州钢厂炼钢分厂西区排污管道总长90m,管径为42.5cm。清洗前管道堵塞程度达五分之四,个别部分几乎达到90％,经清洗总公司工程部清洗后管道输通率达到95％以上,管壁出现金属光泽。这段管道中不光有水垢,更困难的是砖头瓦片、鹅卵石(直径22cm,厚11cm),很坚 Lanzhou Steel Plant West District sewage pipe length 90m, diameter 42.5cm. Before cleaning, the plugs reached four-fifths, and the individual parts almost reached 90%. After the cleaning of the head office engineering department, the pipeline transfer rate reached over 95%, and the metal luster appeared on the pipe wall. This pipe is not only a scale, more difficult brick tiles, pebbles (diameter 22cm, thickness 11cm), very strong