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JPH03273883A
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Thrust generating method and device by magnetic force and power energy generator using this device
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JPH01202153A
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Magnetic force rotator
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JPS6359778A
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Magnetic force turbine
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JPS62185554A
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Magnetic force prime mover
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JPS5547426A
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Detection for liquid leakage
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JPS5612699A
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Sound isolating apparatus with waterrfountained screen
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JPS53111780A
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Detecting method of leakage of fluids
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JPS5330026A
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Leak detectors for submarine pipelines
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JPS5255018A
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Method of preventing diffusion of leakage fluid
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JPS51129684A
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Fluid detecting cable
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JPS51120277A
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Fluid leakage detecting system
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JPS51129003A
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Rescue device for train meeting accident in tunnel
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JPS51112392A
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Cable for fluid detection
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