Both wet and dry underwater welding operations are presented to repair the burst at the welding seam of large size crossing steel pipe.
介绍了大口径过河钢管接口焊缝爆漏现象，以及湿法和干法水下焊接修复技术。
In-seam water infusion is a major measure for prevention of rock burst.
煤层注水是防治冲击地压的一种主要措施。
Finally, the risk zone of rock burst in No. 3 coal seam is evaluated.
在此基础上对该矿3号煤层冲击地压的区域危险性进行了评价。
Finally, the risk zone of rock burst in No. 3 coal seam is evaluated.
在此基础上对该矿3号煤层冲击地压的区域危险性进行了评价。
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