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Class Information
Number: 137/247.47
Name: Fluid handling > With liquid valves or liquid trap seals > Liquid seal in liquid flow line; flow liquid forms seal > U-seals > Enlarged upflow leg > Topside access opening
Description: Seals with a top side access means located above the liquid seal level.

Patents under this class:

Patent Number Title Of Patent Date Issued
4487219 Floor drain or some other cupped water seal Dec. 11, 1984

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