| 摘要 |
The invention relates to the field of pre-insulated conduits for the supply of low-pressure conditioned air and, more precisely, it relates to a method for manufacturing conduits with circular or elliptic section. The method foresees the realisation of two steps 4a and 4b on the longitudinal edges of two semi-conduits and the connection of the said two semi-conduits with press-insertion mechanical joints applied to the polyurethane or polyurethane and aluminium or steel sheet. |
