| 摘要 |
A helically fabricated flexible hose having two reinforcing wires (100, 110) which also serve as electrical conductors and a multiple-ply wall which is thicker over the wire convolutions than between them and is reinforced with cords (150, 160, 170, 180, 190) within the wall plies, is produced by means of a continuously advancing definite length mandrel device wherein a cylindrical mandrel surface is formed by helically wound closedloop belt convolutions (30A, 30B). A plurality of belts are employed to form the mandrel surface. |
