| 摘要 |
The drive mechanism (1) moves gripping jaws by pushing the ends of the jaws apart. It has two end faces (4,5) which are moved apart by a set of pistons (15,16), moving in cylinders (18,19). The mechanism also includes two threaded spindles (8,9) engaging threaded bores (13) in the ends of a central portion (14). The spindles have square ends (10) and may be turned in opposite directions.
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