| 摘要 |
An upper support is upwardly spaced above a lower support and connected with the latter so as to be moveable downwardly toward and away from the lower support. A hollow elongated elastomeric spring is arranged below and in engagement with the upper support, with its longitudinal axis in upward position so that the spring is elastically compressible in direction of its longitudinal axis when the upper support moves in direction towards the lower support.
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