短語(yǔ)詞組短語(yǔ)water diversion tunnel project 引水隧洞工程water diversion tunnel line 引水洞線water diversion tunnel engineering 輸水隧洞工程long -distance non-pressure water diversion tunnel 長(zhǎng)距離無(wú)壓引水隧洞 返回 water diversion tunnel