Russian standards PDF
Photomultipliers. Measuring method of signal to 'noise in the signal' ratio
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Photomultipliers. Measuring method of nonlinearity of light characteristic in static mode
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Peat and products of its processing for agriculture. Methods for the determination of exchange and active acidity
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Rounded-off pan-head screw, product grades A and B. Design and dimensions
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Dispersions of polymers and copolymers, aqueous. Microphotographic method for the determination of particles size
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