| 摘要 |
<p>A radial ply (1) try P having a maximum axial width So, comprising a crown reinforcement (3) formed by at least two working crown plies (32, 34) whose axial widths L32,L34 are greater than the width L33 of an additional reinforcement (33) comprising non-extendable and substantially radial reinforcing elements and which is radially disposed between said plies (32), being axially comprised of three parts, a center part in the form of a ply (33') formed from non-extendable and substantially radial reinforcing elements, having a width and two side parts in the form of strips (33 ) which are both formed from circumferential reinforcing elements, whereby the modulus of elasticity with respect to traction per side strip (33 ) unit width is at the most equal to the modulus of elasticity with respect to traction of the most extendable working ply (32, 34) when measured in the same conditions.</p> |
