基本解释[机械工程]啃轨词组短语短语gnaw rail b 起重机啃轨gnaw rail by crane 起重机啃轨专业释义机械工程啃轨For a long time in order to settling the gnaw rail problem a great many endeavors and attempts having been done by people.因此长期以来人们为解决啃轨问题做了很多努力和尝试。