片语
main irrigation channel干线渠道
irrigation canal[农工] 灌溉渠,浇灌渠
irrigation channel system渠系
irrigation channel distribution渠道配水
irrigation n channel进水渠道
irrigation channel in Ningxia宁夏引黄灌渠
irrigation channel in yellow river引黄灌渠
irrigation channel flow measurement末级渠道量水
irrigation-drainage channel灌排渠道
irrigation district channel灌水区渠道