FIELD: construction. SUBSTANCE: inner pipe line 37 is made up as two strips of multi- layered glass cloth. Outer coaxial pipe line 38 has baffles 36 defined by gluing the inner pipe line overlap and is made up as two shells-hoses secured to the baffle. The outer pipe line is strengthened by the circular wounding of an impregnated multilayer glass cloth. EFFECT: improved design. 5 dwg
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