| |||
water main | |||
water-main | |||
down main | |||
water supply main pipe | |||
feed main; feed-water main; main supply conduit; public supply mains; supply main; water main (pipeline); water supply mains; flow main |
给水干 管 : 9 phrases in 2 subjects |
Hydroelectric power stations | 2 |
Technology | 7 |