overhead convection type向上: upward; up对流: convection; convection curre ...式: type; style向上对流式管式炉: overhead convection type of pipe still上对流层: higher troposphere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:向上对流式，即可在微信中查询翻译
