回帖:cdddd:围岩等级
https://xue.baidu.com/okam/pages/strategy-tp/index?strategyId=125030892908448&source=natural
围岩分级
https://wenku.baidu.com/view/bce80f09a6c30c2259019efb.html?fr=aladdin664466&ind=2
国家铁路隧道的围岩等级是怎么分类的?
....... (2022-09-13 19:23)
谢谢了,多谢分享!