indirect drain pipe

例句：

1. 1. The construction of the new sewer system has been delayed due to the indirect drain pipe issue.
   由于间接排水管道问题，新下水道系统的建设被推迟了。
2. 2. The company is considering installing a more efficient indirect drain pipe to reduce water usage.
   该公司正在考虑安装更高效的间接排水管道以减少用水。
3. 3.The indirect drain pipe was installed incorrectly, causing a blockage in the main line.
   间接排水管道安装错误，导致主管道堵塞。