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The standards set forth herein apply to the first edition of the Standard for Gas Appliance Pressure Regulators, ANSI Z21.18-1995/CGA-6.3-M95, and supersede corresponding standards therein. Following their preparation by the supervising subcommittee, they were accepted by ANSI and the Interprovincial Gas Advisory Council, and subsequently approved.
Note: Changes, other than editorial, are denoted by a vertical line in the margin.
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