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Different stages of gas sensing devices: a foreman photograph shows a... | Download Scientific Diagram
When did they stop the practice of carrying canaries in the coal mines to detect carbon monoxide? What do they use instead? - Quora
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![Presentation of Bird, canary in cage as being used in coal mines for gas detection. Coal Mine museum, Oranje Nassau, Heerlen, Limburg, Netherlands Stock Photo - Alamy Presentation of Bird, canary in cage as being used in coal mines for gas detection. Coal Mine museum, Oranje Nassau, Heerlen, Limburg, Netherlands Stock Photo - Alamy](https://c8.alamy.com/comp/HY4BEC/presentation-of-bird-canary-in-cage-as-being-used-in-coal-mines-for-HY4BEC.jpg)
Presentation of Bird, canary in cage as being used in coal mines for gas detection. Coal Mine museum, Oranje Nassau, Heerlen, Limburg, Netherlands Stock Photo - Alamy
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Bi-Weekly Safety Meeting November 29, The days of using canaries in mines as primitive gas detectors are long gone..they've been replaced by fixed. - ppt download
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