倒锥度反向气流反斜度逆通风back: n. 1.背，背部；背脊；背面，反面；背后，后部，后面， ...draught: n.，，adj. ＝ draft. draught back: 倒流休风back draught stack: 倒流休风烟囱back draught system: 倒流休风系统下载手机词典可随时随地查词查翻译
