| 摘要 |
The improvements apply to lock and retention elements for public works and similar machines of the type incorporating a combination of one or various metal elements with one or various blocks of elastomer material, irrespective of whether they are joined to the former or not, in which the block of elastomer material is made up of an elastic structural material containing multiple internal cavities in the form of closed cells, that are for the most part separated from each other, and which contain a gas that allows the elastomer block to be compressed and reduced in volume during the compression that metal pieces exercise on the elastomer block, showing minimum transverse expansions.
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