As {TAIL ~ a consequence stopper} 26 may be pushed with its teeth 27 and 28 over {HEAD ~ surface} 31 and can not thereafter be loosened therefrom without applying force 
As { TAIL ~ a consequence stopper } 26 may be pushed with its teeth 27 and 28 over { HEAD ~ surface } 31 and can not thereafter be loosened therefrom without applying force
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH