基本解释[机械工程]地表排水渠英汉例句双语例句In this case, the water table is not flow surface and there is no"seepage surface" on the side walls of drainage river channel.该条件下的潜水位面不是流面，在排水河渠边壁也不存在所谓的“渗出面”。surface drainage channel更多例句词组短语短语drainage surface channel 排水明渠surface drainage channel更多词组专业释义机械工程地表排水渠