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Re: Sight glass
Posted to HVAC Forum on 6/24/2016 3 Replies

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Myron, if you are doing a patent search for your idea, also search for:

Fluid Flow Sight Glass (1949-1952):

[...] [[...]]

Liquid Circulation Indicator (1950-1952 Refrigerant):

[...] [[...]] ... Login to read more.

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