the bottom of said head being flat and substantially perpendicular to the axis of said cylinder body, said measuring {HEAD ~ element} being axially slidable in {TAIL ~ a bore} closely adjacent to the flat bottom of said head and substantially parallel thereto, to facilitate measurement of even very shallow holes in workpieces 
axially slidable in
the bottom of said head being flat and substantially perpendicular to the axis of said cylinder body , said measuring { HEAD ~ element } being axially slidable in { TAIL ~ a bore } closely adjacent to the flat bottom of said head and substantially parallel thereto , to facilitate measurement of even very shallow holes in workpieces
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH