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DE727186C
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Magnetostrictive underwater sound transducer
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DE727994C
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Plug connection with any number of poles for the transmission of the smallest voltages
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DE727089C
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Sound transmitter operated with compressed air for echo sounder systems
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DE722307C
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Bridge circuit used for display or control, of which two branches are formed by pipes
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DE718290C
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Adjustment device for centrifugal contact regulator with a pressure lever
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DE727879C
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Device for frequency doubling by means of a body made of magnetostrictive material
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DE728152C
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Magnetostrictive sound absorber
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DE701440C
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Compensator chain with correction links
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DE701400C
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Device for the simultaneous determination of direction by several observers
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