| 摘要 |
FIELD: air conditioning and ventilation. ^ SUBSTANCE: piping article comprises core (1) made of a pipe section made of, e.g., a fiber porous polyethylene. Transverse recesses (2) and cuts (3) are staggered and directed oppositely with respect to each other. The width of each recess decreases in both directions from its middle part toward the ends of the cuts. Core (1) is provided with a three-layered flexible coating. The faces of the piping article are provided with joining members made of, e.g., branch pipes (7) and (8). When the piping article is bent, the core is stretched owing to the presence of cuts (3) and flexibility of the surface. The opposite side is compressed due to recesses (2) in the wall of core (1) and flexibility of the coating. ^ EFFECT: simplified structure. ^ 50 cl, 3 dwg |
