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Gas impervious diaphragm
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Dome construction for pressure regulating device
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Three chamber meter
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Venting means for regulators
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Temperature and pressure compensating device for gas meters
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Pressure relief means for gas meters
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Combination meter top and regulator
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Combination regulator and meter index ring mounting
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Dust filter means
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Trap
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Combined meter and regulator
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Meter top and index box
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Gas meter diaphragm
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Gas pressure regulator valve
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Relief means for pressure regulators
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Inter-geared means for adjusting plural crank arm lengths in gas meters
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Gyratory valve disk
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Gas meter
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Meter head incorporating lowpressure regulator
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Meter structure incorporating pressure relieving devices
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