| 摘要 |
This invention pertains to fluid-driven crimping tool and more particularly to a valve control mechanism having a barbed and tipped shaft and locking jaws whereby the jaws permit advancing motion of the shaft but denies retraction thereof until the jaws are forced apart by engagement thereof by the shaft tip. This latter action allows a sleeve to advance between the barbs and the locking jaws, remaining in such protective position until the barbs and shaft are retracted from the locking jaws.
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