| 摘要 |
Apparatus is illustrated for raising and lowering the bed of a press having a fluid operated jack mechanism for engaging work carried by the bed of the press. The apparatus includes a fluid operated ram carried by one of the standards or legs of the press having pivotal connection with one end of the bed and cable and pulley mechanism connecting the other end of the press for raising and lowering the bed preparatory to fixing same in an adjusted vertical position, maintaining same in level condition at all times.
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