The screw feed mechanism 39, which converts {TAIL ~ the rotating movement} of the thrust receiving flange 74 into a thrusting movement of the output rod 33, includes a male thread member 95 and {HEAD ~ a female thread member} 96 
The screw feed mechanism 39 , which converts { TAIL ~ the rotating movement } of the thrust receiving flange 74 into a thrusting movement of the output rod 33 , includes a male thread member 95 and { HEAD ~ a female thread member } 96
OTH OTH OTH OTH OTH OTH OTH OTH TAIL 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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH