carbonaceous atmosphere含: keep in the mouth碳: carbon保护: protect; defend; guard; safe ...气氛: atmosphere; air保护气氛: blanket; protective atmosphere; protectiveatmosphere; shielding atmosphere; shielding gas atmosphere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:含碳保护气氛，即可在微信中查询翻译
