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  1. ...gas then flows up through the base through a small hole at the bottom of the barrel and is directed upward. There are open slots in the...

    分類:科學及數學 > 化學 2007年12月20日

  2. ... split into smaller ones, so that the yield of gasoline from a barrel of crude oil was increased. C. Alkylation and Catalytic Cracking Two additional basic processes...

    分類:科學及數學 > 化學 2006年12月10日

  3. ...of applying a hot adhesive. The glue gun melts the solid adhesive and then allows the liquid to pass through the " barrel " of the gun onto the material where it solidifies. Paul E...

    分類:科學及數學 > 化學 2009年04月15日