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heat meter, which is a device for measuring the quantity verwarmingsmiddel an accessory driveswith a device for measuring the temperature difference between the water and the verwarmingsmiddel cooperates with a mechanical indicating device is connected.
heat meter, which is a device for measuring the quantity verwarmingsmiddel an accessory driveswith a device for measuring the temperature difference between the water and the verwarmingsmiddel cooperates with a mechanical indicating device is connected.