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Auger boring rod for magnetic exploration and bit for auger boring rod
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Lifter mounting tool for magnetic prospecting
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Elevator
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S-wave exciting method, s-wave exciting part and seizer
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Method for measuring propagation speed of seismic movement and rotational seismometer
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Secondary coil balance adjusting mechanism and method
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Phase difference measuring device, and zero adjusting device and method thereof
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Method for inspecting hammering using wavelet conversion
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Wave motion generating method and device therefor
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Method and device for surveying buried state of submarine pipeline or the like
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Measurement of land subsidence using magnetic mat
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