fault-trough lake地堑湖
fault depression trough断陷海槽
fault power trough断层槽
fault power trough lake地堑湖
deep-fault trough深断裂谷
excavation of fault trough路堑开挖
fault trough lake地堑湖
the Gesi Fault Trough格斯断槽
fault trough submarine valley断槽海底谷;断层槽海底谷