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0326 - Development Of Measurement Science In China. A primary standard resi...Back

Development Of Measurement Science In China. A primary standard resistor comparator for industrial establishments and scientific units has been made by the Shanghai Electrical Instruments Factory. Photo shows a metrological worker calibrating standard resistors with the comparator.
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0325 - Development Of Measurement Science In China. A primary standard resi...Front
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0327 - In the course of expanding one of Shanghai's power plants this 125,0...Front
0327 - In the course of expanding one of Shanghai's power plants this 125,0...Front

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Year 1973

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