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BS 7461:1991
M00000879
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BS 7461:1991 Specification for electrically operated automatic gas shut-off valves fitted with throughput adjusters, proof of closure switches, closed position indicator switches or gas flow control
standard by BSI Group, 09/30/1991
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Additional requirements and test methods. Supplements BS EN 161.Cross References:
BS 5885:Part 1
BS EN 161