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CA452384A
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Method and means for supersonic inspection
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CA470582A
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Inspection of solid parts utilizing supersonic transmission
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CA621291A
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Ultrasonic rail weld scanner
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CA499923A
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Rail flaw detector mechanism
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CA474061A
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Automatic regulation of rail flaw detection sensitivity
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CA467564A
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Rail flaw detector mechanism
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CA475400A
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Supersonic inspection
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CA586703A
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Electric induction welding
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CA476132A
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Rail flaw detector mechanism
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CA501695A
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Rail flaw detector mechanism
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CA435861A
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Rail flaw detector mechanism
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CA457727A
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Time marks for the sweep of a cathode ray tube
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CA676092A
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Electrostatic field cancelling transducer
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CA452565A
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Method and means for supersonic inspection
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CA494706A
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Rail flaw detector mechanism
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CA383289A
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Rail flaw detector mechanism
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CA649804A
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Thyratron impulse generator
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CA525958A
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Ultrasonic inspection device
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CA571640A
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Ultrasonic wave train generator
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CA670540A
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Amplifier gain compensator for variable ultrasonic signal response
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