flat drainage平面: plane; two dimensions; flat ...排水: drain off water; drain away ...地面排水；路面排水: surface drainage背面排水: back drainage表面排水: surface drainage下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:平面排水，即可在微信中查询翻译
