I would like to tell you I am smart but I am not. This was luck I discovered this. I noticed in my trailer that when I was lighting the stove I did not get the over expected ignition of the propane. That is what started my research.I found that testing was conducted and published in 1987. Here is some reading on the subject you may like.
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www.cpsc.gov]
Jim Mazerat
Forensic Investigations Group