短语词组短語Weak Surrounding Rock Tunnels 軟巖隧道weak -rock 軟巖buried weak surrounding rock 淺埋軟弱圍巖weak wall rock 軟弱圍巖weak swelling rock 軟弱膨脹性weak tectonic rock zone 搆造軟弱巖帶Weak Metamorphic Rock 弱變質巖weak country rock 軟巖 返回 weak rock