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<http://schema.org/description>
"SION OR IO NORMS OF ENGINEERING  PRODUCTS free search updated Standard Input Output Norms SION or IO Norms from DGFT. Complete Handbook vol 2 of year 2009, 2008, 2007 and 2006."
<https://www.eximguru.com/ionorms-sion/c1051_incandascent-automobile-bulbs-upto-30.aspx>