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0144 - Members of an optical designing group of the Changchun Optical Preci...Front

Members of an optical designing group of the Changchun Optical Precision Machinery Institute measuring penetration of newly designed crop.
0144 - Members of an optical designing group of the Changchun Optical Preci...Front
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0145 - Members of an optical designing group of the Changchun Optical Preci...Back
0145 - Members of an optical designing group of the Changchun Optical Preci...Back

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Year 1973

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B04 Industry
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