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sf6 Load break switch underground substation detector factory-sell-directly

ELECTRICAL PLAN SYMBOLS ELECTRICAL ONE-LINE SYMBOLS ...· PDF fileswitch and single receptacle a = circuit designation b = device type designation disconnect switch a = type, refer to disconnect schedule smoke detector a = type i = ionization p = photoelectric d = duct detector fire sprinkler f = flow switch t = tamper switch multi conductor cables k/2/c#16s k (where indicated) = number of pairs

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