closed conduit flow封闭式: closed type; enclosed; potte ...管道: pipeline; channel; tunnel; p ...闭式管道输送系统: closed pipeline system封闭式输水管道: closed aqueduct封闭式输送管道: enclosed conveyer conduit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:封闭式管道流，即可在微信中查询翻译
