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| Application No. | Application Title | Issue Date |
| 20110250021 | METHOD AND ARRANGEMENT FOR DETECTION AND DESTRUCTION OF TUNNELS A method and arrangement for destroying tunnels. A subterraneous, vertical shaft is excavated until a tunnel preventing depth. After liquid is introduced to the shaft, a shaft liner is penetrable by the introduced liquid when a tunnel is present in the vicinity of said ... | 10/13/2011 |
