- Hayward Baker Inc. (HB)
recently used the Wassara water hammer (its successful employment
in Boston's "Big Dig" project was described in geoDrilling International
May 1998, pages 4-6) on a construction project in New York, US
Trouvé
par: FAST Search (alltheweb.com), Lycos
http://www.mining-journal.com/GEODRILL/gdi0299.htm
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