堅(jiān)硬巖，巖體較破碎；
較堅(jiān)硬巖或軟硬巖互層，巖體較完整；
較軟巖，巖體完整
450～351
上一頁(yè) [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] 下一頁(yè)
