{HEAD ~ A substantially white powder} for {TAIL ~ use} as a filler and extender derived from by products of manufacturing vitreous low alkali, low iron glass fibers, and a method for producing the powder 
for
{ HEAD ~ A substantially white powder } for { TAIL ~ use } as a filler and extender derived from by products of manufacturing vitreous low alkali , low iron glass fibers , and a method for producing the powder
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