| 摘要 |
<p>A flexible backing for abrasive material in sheets, constituted by a body (1) which is composed of at least three materials which are stably coupled in layers (3, 4, 5), an intermediate layer (3) being constituted by a steel core, and the outer layers (4, 5) being constituted by laminae made of elastic material which have different moduli of elasticity. <IMAGE></p> |
