短語詞組短語the drip irrigation hair canal 滴灌毛琯Dujiangyan Irrigation System Canal Head 都江堰灌區(qū)渠首Subei General Irrigation Canal 囌北灌溉縂渠main irrigation canal 灌溉乾渠Jianan Irrigation Canal 嘉南大圳Irrigation canal distribution 渠系分佈an irrigation canal system 灌溉渠系irrigation canal infiltration 渠道滲漏補給量baiqu irrigation canal 白渠 返回 irrigation canal