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JPS57145091A
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Lightweight composite soundproof panel
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JPS5757204A
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Method of measuring thickness of film formed on surface of ferromagnetic substance
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JPS5730943A
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Detecting method for defect in ferromagnetic material
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JPS55152558A
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Pulverizing method of coarse solid matter
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JPS55102490A
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Treatment of water containing borofluoric acid and borofluoride of heavy metal
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JPS5595999A
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Sound absorption structrre consisting of transparent synthetic rubber film material
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JPS5579099A
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Dehydrating treatment for moist sludge
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JPS5551197A
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Leakage preventing method for buried drain and conduit pipe
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JPS54144765A
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Method of disposing waste water containing fluorine
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JPS5526438A
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Vibration characteristic measuring system of vibration- proof and sound-proof structure
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JPS54133746A
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Method of changing water containing fluorine into drinking water
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JPS5373669A
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Apparatus for separating floating solid material from liquid
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JPS5353120A
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Supporting structure of vibration control hinge of sound insulation panel
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JPS534342A
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Removing agent for fluorine in liquid
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JPS534312A
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Sound insulation wall body for building and construction
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JPS52141052A
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Process of water containing fluorine
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JPS52137767A
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Method of separating suspended solid matters contained in liquid
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US4064960A
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Noise barrier
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JPS52126053A
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Method of removing fluorine in water containing fluorine
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JPS52119202A
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Sound insulating structure for solid sound generator
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