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GB1081172A
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Pneumatic controller
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DE1523563A1
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Pneumatic control device
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US3245425A
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Pneumatic controller
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US3234792A
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Displacer operated mechanism
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US2966330A
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Magnetic control means
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US3037103A
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Switch
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US3051805A
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Electric switch control means
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US3046475A
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Magnetic measuring apparatus
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US2911830A
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Viscous fluid level measuring device
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US2824186A
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Fluid pressure actuator
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US2777045A
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Tank control
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US2784273A
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Float operated device
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US2576561A
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Magnetic control device
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US2564655A
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Magnetic control device
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US2503089A
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Magnetic control mechanism
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US2625042A
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Liquid level responsive mechanism
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US2612572A
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Magnetic control mechanism
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US2488758A
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Magnetic control device
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US2467073A
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Magnetic control mechanism
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