The upper end of the link 13a is hinged to {HEAD ~ a bolt} 14, which can be adjusted relative to the upper plate 8 and can be fixed in {TAIL ~ every adjusted position} by a nut 15 
The upper end of the link 13a is hinged to { HEAD ~ a bolt } 14 , which can be adjusted relative to the upper plate 8 and can be fixed in { TAIL ~ every adjusted position } by a nut 15
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH