Mounted on the shaft 30 is a viewing or telescopic apparatus V having {HEAD ~ a base plate} 50 welded or otherwise secured to {TAIL ~ the shaft} 30 
welded to
Mounted on the shaft 30 is a viewing or telescopic apparatus V having { HEAD ~ a base plate } 50 welded or otherwise secured to { TAIL ~ the shaft } 30
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH