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Pilfer proof valve
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Pressure regulator with pressure relief valve
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Pressure fitting for plastic tubing
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Burner for heating a gaseous medium having a low oxygen content
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Pressure fitting for a tube joint
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Nozzle mixing gas burner
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Radiant spiral flame gas burner
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Mounting for replaceable gas burner
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Gas burner
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Pressure fitting for a tube joint
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Air heating burners
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Nozzle mixing burner assembly
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Scotch marine fire tube boiler
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Fire tube boiler
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Tamper-proof control for a by-pass type meter bar
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By-pass gas meter bar and key actuator therefor
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Tube-firing gas burner assembly
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Gas meter change-over fitting
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Gas meter change-over fitting
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Automatic shut-off valve
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