Whereas it is very important for the technique of grouted rock bolts timbering to stabilize the underground rock and is widely used at the same time.是什么意思_Whereas it is very important for the technique of grouted rock bolts timbering to stabilize the underground rock and is widely used at the same time.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句