The slide valve includes a pre loaded spring, capable in the absence of {HEAD ~ other force} of moving {TAIL ~ the slide valve} to its closed position to lock the member against movement 
of moving
The slide valve includes a pre loaded spring , capable in the absence of { HEAD ~ other force } of moving { TAIL ~ the slide valve } to its closed position to lock the member against movement
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH