FIELD: civil engineering. SUBSTANCE: each sheathing is formed by two sheets of thermoplastic composition material with cellular or corrugated filler therebetween. External surface of at least one sheathing is coated with protective, facing or waterproofing layer. EFFECT: improved design. 7 cl, 1 dwg, 1 tbl
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Authors
Dates
1995-03-27—Published
1992-08-28—Filed