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(11) | EP 1 970 494 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Pile formation |
| (57) An article is described for use in forming a pile. The article 10 has at least one
generally helical flight 12 for driving into the ground. The pitch P of the flight
12 is at least four times the diameter D of the flight.
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