Because the width of basemeat is small and vertical load is main load,the whole stability must be calculated in the design of coal mine steel headframe.是什么意思_Because the width of basemeat is small and vertical load is main load,the whole stability must be calculated in the design of coal mine steel headframe.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句