means for issuing an alarm if a preset terminal position of the forward motion of the ejector pins is remoter from the retracted position than {HEAD ~ the criterial position} of {TAIL ~ the ejector pins} 
of
means for issuing an alarm if a preset terminal position of the forward motion of the ejector pins is remoter from the retracted position than { HEAD ~ the criterial position } of { TAIL ~ the ejector pins }
OTH OTH 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 REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL