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Author Topic: PM research whistle + S-50!  (Read 1754 times)

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Re: PM research whistle + S-50!
« on: March 20, 2024, 04:39:30 pm »
How do you loosen the the metal O ring off the Jensen safety valve? They do not come off no matter what way I turn it.
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The steam engine has done much more for science than science has done for the steam engine.”

― Lord Kelvin
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