The range of movement of the rod 52 is determined by the setting of {HEAD ~ a collar} 68 toward the upper end of {TAIL ~ the rod} and below the eyeblot 54 
The range of movement of the rod 52 is determined by the setting of { HEAD ~ a collar } 68 toward the upper end of { TAIL ~ the rod } and below the eyeblot 54
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH