短语词组短语annular ceramic burner 套筒式陶瓷燃烧器annular entry burner 四周进气燃烧器;周环进气喷燃器annular r burner 环状燃烧器;环形燃烧器annular combustion burner 环状烧嘴annular r entry burner 四周进气燃烧器 返回 annular burner