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Posted by Doug Cartwright [50.37.156.229] on Saturday, April 02, 2011 at 18:26:04 :
In Reply to: Acetylene generators posted by David N. Lundstrom [64.68.13.201] on Saturday, April 02, 2011 at 17:45:40 :
Up to 20percent of the gypsum in drywall(US)is fly ash.Its over 90 percent in Japan.
China threw a wrench into the works ,as they use coal that is much higher in sulfer...