hazardous rock mass

• 危岩体

hazardous rock mass的用法和样例：

例句

1. The upper soft layer is creepping, which are the basis of dangerous rockmass and rock columniation in the cliff.
   上部软弱层为蠕滑层，悬崖壁存在的众多危岩体及岩柱以软弱层为基底。