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1988-11-22
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2010-04-14
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1972-05-18
Method and device for pouring with high pressure jet
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1992-09-08
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1990-02-15
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1987-06-11
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1992-10-29
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Introduction of solidifying agents into the subsoil
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2002-01-31
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1993-07-07
Method of constructing an open space at basement level between existing buildings and the structure obtained
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1994-04-21
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1994-01-18
Method for deepening an existing quay wall
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