| | Directed Technologies Drilling, Inc. |
| | 1315 S. Central Avenue, Suite G, Kent, Washington 98032 US |
| http://www.accessone.com/~directech | | directech@accessone.com |
| technologia i postęp techniczny w ochronie środowiska |
| 1996 | | Horizontal Directional Drilling for Environmental Remediation | abs | | 8 | | str | 0,3 | mb |