They include less than 4% antimony by weight to avoid various poisoning effects of {HEAD ~ antimony} on {TAIL ~ the electrochemical processes} involved 
on
They include less than 4 % antimony by weight to avoid various poisoning effects of { HEAD ~ antimony } on { TAIL ~ the electrochemical processes } involved
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH