Gurgaon's roadsides are disfigured by deep trenches, where the trunk sewerline waits to be laid.
古尔冈的路边被深深的地沟弄的不成样，这的排污系统也逐渐的消失了。
2
When the auxiliary sewerline stores the waste water, the waste water can be pumped into the water storage tank through the water suction pipe by the self-sucking pump.
当副下水管道储存有废水时，自吸泵可将废水经抽水管抽至储水箱内。
3
More than 6 million people remain unconnected to any sewerline (mainly because they live in unauthorized housing settlements), and their wastewater flows into open drains.