英语翻译
问题描述：
英语翻译
The rainwater drains to the adjacent belowgrade fiberglass tank through a 6-inch by 8-inch metal gutter to a 4-inch downspout and polyvinyl chloride (PVC) and copper pipes.Once in the tank a Familian Northwest H2O FloPro moni-toring system controls the Gould (G&L) pump that raises the harvested rainwater to a 200-gallon
mixing tank.At this point,if no water is in the cistern,municipal water is turned on to allow the system to operate.（我不太懂这段,请您别直接机译）
答
（下雨时,）雨水先流过一段6x8英寸的金属天沟,再流过一段直径4英寸的落水管,最后流过一段pvc管子和一段铜管,最终注入到（与房子）相邻的一个地下玻璃钢水罐.这时,Familian Northwest H2O FloPro 控制系统会操纵gould...