soft rock drift

• 软岩巷道

soft rock drift的用法和样例：

例句

1. The application of repairing soft rock-tunnel by pregrouting is introduced.
   介绍了注浆技术在软岩巷道修复施工中的应用。
2. The polypropylene fibre concrete is the new kind of concrete flexible shotcrete layer forms in the soft rock tunnel sup-porting engineering.
   摘要聚丙烯纤维混凝土柔性喷层是软岩巷道支护中一种新型的喷层形式。