{HEAD ~ The rearward end} of the plug pin 30 is held by a pin mounting 33, onto {TAIL ~ whose rear end} 34 a helical spring 35 is pushed 
{ HEAD ~ The rearward end } of the plug pin 30 is held by a pin mounting 33 , onto { TAIL ~ whose rear end } 34 a helical spring 35 is pushed
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH