{HEAD ~ The snap fit acts} to prevent {TAIL ~ removal} of the cap once positioned on the cylinder, thus providing further safety against re use of the syringe 
to prevent
{ HEAD ~ The snap fit acts } to prevent { TAIL ~ removal } of the cap once positioned on the cylinder , thus providing further safety against re use of the syringe
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH