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