Quality of high-expansion foam fire extinguishing agent produced by Chuan Gu Fire Protection Material Plant Beijing is guaranteed good for 8 years是什么意思_Quality of high-expansion foam fire extinguishing agent produced by Chuan Gu Fire Protection Material Plant Beijing is guaranteed good for 8 years在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句