08-05-2018, 03:05 PM
Welch Scientific made supplies and instruments for teachers. So it looks like it might be a device used to explain what phase shift is. But I don't have a clue as to how it would be used.
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Welch Scientific What is it?
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Welch Scientific What is it? - by vecher - 08-04-2018, 09:18 PM
RE: Welch Scientific What is it? - by Patrick - 08-05-2018, 03:05 PM
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