短語詞組短語irrigation n channel 進水渠道irrigation district channel 灌水區(qū)渠道main irrigation channel 乾線渠道irrigation channel system 渠系;灌溉渠系irrigation channel flow measurement 末級渠道量水irrigation channel in Ningxia 甯夏引黃灌渠irrigation -drainage channel 灌排渠道irrigation channel distribution 渠道配水irrigation channel in yellow river 引黃灌渠 返回 irrigation channel