In accordance with the domestic production and application cases for pitch as impregnating agent,suggestions for speeding up the commercial producti on of pitch as impregnating agent are given.是什么意思_In accordance with the domestic production and application cases for pitch as impregnating agent,suggestions for speeding up the commercial producti on of pitch as impregnating agent are given.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句