collecting main降尘: dust fall总管: fore-overman; house steward; ...降尘: dust fall◇降尘量 dustfall content; 降尘室 dust-settling compartment降尘袋: dust settling pocket降尘管: main duct; windmain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:降尘总管，即可在微信中查询翻译
