Packing uses flexible graphite for dependable sealing performance.If request by users ,packing spacer ring and greasing mechanism can be available .是什么意思_Packing uses flexible graphite for dependable sealing performance.If request by users ,packing spacer ring and greasing mechanism can be available .在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句