Not to be used for fighing rire,entering oxygen defi-cient voids or tanks,or worn by fire fighters. 3 There is a pressure gauge on the cylinder to indicate the cylinder pressure .是什么意思_Not to be used for fighing rire,entering oxygen defi-cient voids or tanks,or worn by fire fighters. 3 There is a pressure gauge on the cylinder to indicate the cylinder pressure .在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句