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Method for using phase-gating controllers as frequency converters
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Method for rotational speed measurement on electric motors
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Method for adjusting desired values in regulated pump systems
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Method for regulating the operation of pumps
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Method for preventing the freezing of liquid ring vacuum pumps or the like
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Pump system for operating pump installations comprising a plurality of pumps
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Process for operating pressure booster systems
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Arrangement for optimising the operation of vacuum pump installations
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System for operating liquid pumps by means of solar cells
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System for automatically switching liquid pumps on and off
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Water ring pump
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ARRANGEMENT TO MINIMIZE COOLANT CONSUMPTION IN PARTICULAR. FOR LIQUID RING VACUUM PUMPS OR THE LIKE.
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CONTROL AND CONTROL SYSTEM, IN PARTICULAR. FOR WATERING VACUUM PUMPS
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Control system for heating installations and the like
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Pressure release device for refrigerating medium circuits
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Single phase capacitor motor with speed changing facility - has series resistor for low speed starting in parallel with PTC resistor
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Casing section for rotary pump - has flexible plastics inner part supported in rigid metal outer section
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CANNED MOTOR PUMP
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Bearing for rotary water pumps - has spherical seat body mounted on pump shaft to act as seal
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Pump for chemically dosing water - has water pump crankshaft with eccentric driving admixture metering pump flanged to water pump housing
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