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A-A-51939 1987 Edition, April 24, 1987
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MONITOR, TRI-GAS
Includes all amendments and changes through Cancellation Notice 1, September 12, 2012
Additional Comments: CNCL NO S/S
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The General Services Administration has authorized the use of this commercial item description.

This commercial item description covers a tri-gas monitor suitable for measuring levels of oxygen, methane and carbon monoxide in an industrial hygiene field environment.