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Addenda to American National Standard/Canadian Standards Association Standard Z21.80-1997/CGA 6.22-M97 and Z21.80a-2000/CGA 6.22a-M00 for Line Pressure Regulators.
NOTE: Changes, other than editorial, are denoted by a vertical line in the margin. Approved September 27, 2000 by American National Standards Institute, Inc. Approved August 22, 2000 by the Interprovincial Gas Advisory Council. Effective in Canada October 1, 2002.
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