The original packing material has the problem of quality, the carbon content of the stainless steel packing has not reached the standard of the ultralow carbon 316L stainless steel.是什么意思_The original packing material has the problem of quality, the carbon content of the stainless steel packing has not reached the standard of the ultralow carbon 316L stainless steel.在线翻译_英语_读音_用法_例句