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Drum recording mechanism for oscillographs
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Cathode ray recording oscillograph
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Slow speed time marker
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Principal strain computers
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Balanced bellows pressure head
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Gear changing mechanism
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Synchronous time system for oscillographs
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Noise suppressor for strain gauges
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Apparatus for producing oscillographic records
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Electric blood pressure recording system
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Electrical strain measuring apparatus
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Accelerometer
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Electrical gaging apparatus
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Means for mounting testing apparatus
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Calibrating apparatus
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