这些街道污水管又相结一条污水支管。此支管与次干管连接,然后经主干管将污水送至污水处理厂。
Several of these flow into a branch sewer, which joins first a sub-main and then a main sewer taking it to the treatment plant.
这些街道污水管又相结一条污水支管。此支管与次干管连接,然后经主干管将污水送至污水处理厂。
Several of these flow into a branch sewer, which joins first a sub-main and then a main sewer taking it to the treatment plant.
应用推荐