The active door lock includes a dead bolt and a lever for extensible locking engagement with {HEAD ~ a strike plate} on {TAIL ~ the inactive door} 
on
The active door lock includes a dead bolt and a lever for extensible locking engagement with { HEAD ~ a strike plate } on { TAIL ~ the inactive door }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL