{TAIL ~ The second clamp} 14 opens by removing a primary pin and {HEAD ~ a safety pin} in the nature of the first clamp 
{ TAIL ~ The second clamp } 14 opens by removing a primary pin and { HEAD ~ a safety pin } in the nature of the first clamp
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH