The characteristics of working in the airtight space and the different perilousness analysis are introduced. At the same time,the safety measures and safely management items are put forward.是什么意思_The characteristics of working in the airtight space and the different perilousness analysis are introduced. At the same time,the safety measures and safely management items are put forward.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句