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Dosimeter
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High potential x-ray machine
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Shockproof x-ray unit
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Speed control device for movable grids
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Thermionic cathode X-ray stabilizer system
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Means and method of producing an X-ray focus varying with the x-ray tube load
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X-ray system
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Synchronously operated timing device
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Electrically operated hair curler
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Vacuum discharge tube
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Mounting for x-ray tubes
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X-ray unit
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Safety system for small x-ray units
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Electrically operated timing mechanism
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X-ray apparatus
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Electric system for energizing cutting electrodes
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Change-over system
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High tension switch
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Sponge electrode
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Electrically-operated hair curler
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