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