The development survey of Hegang coal communication special net and telecommunication public net,and the best way for special net going into the public net are introduced.是什么意思_The development survey of Hegang coal communication special net and telecommunication public net,and the best way for special net going into the public net are introduced.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句