Further through the special construction clogging or plugging of the ports is minimized by {HEAD ~ the distribution} through {TAIL ~ the radial ports} and a circumferential recessed protective groove adjacent the plug end 
through
Further through the special construction clogging or plugging of the ports is minimized by { HEAD ~ the distribution } through { TAIL ~ the radial ports } and a circumferential recessed protective groove adjacent the plug end
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH