| 摘要 |
<p>The volumetric density distribution of a body of the shim has such profile that the density of the shim body is maximized at an upper surface portion of the shim, at which the shim is in contact with the cam when a compression load or shock from the cam is applied to the shim. The density is gradually decreased from the maximised portion to at least one of a lower surface portion and a peripheral portion of the shim. The density is gradually decreased from the upper surface portion to the lower bottom surface portion of the shim.</p> |
