down pipe 落水管 ; 雨水管
blow-down pipe 放空管
run-down pipe 溢流管
storm down pipe 暴雨水落管
wash-down pipe 冲洗管
boiler water blow-down pipe 锅炉排污管
Exhaust Down Pipe 排气下管
rain down-pipe 水落管
N a pipe for carrying rainwater from a roof gutter to the ground or to a drain 落水管 (Also called rainwater pipe, drainpipeUsual US and Canadian name downspout) [英国英语]
Crews are slowly pumping heavy drilling mud into a cap on the top of the well, to push down hydrocarbons that are already present in the well pipe.
工程人员正在缓慢地将特殊泥浆注入井口上的控油罩，将油井管道中已经形成的碳氢化合物压在下面。
Michael continues trying to pull down on the pipe, but it won't budge.
Michael继续试图撬动那条管道，但是根本没用。
Michael removes a single button from the jacket and throws it down the new pipe. The button clatters down the pipe’s gentle downward slope.
Michael从西服上取下一颗钮扣，从管道中扔了下去，钮扣顺着管道平缓向下的坡道掉下去，发出哗啦啦地声音。
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