Russian standards PDF
Oscillator, modulator and regulation tubes with anode dissipated power above 25 W. Methods of measurements of cathode emission
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Gas discharge devices. Methods of measurement of electrical parameters of operating and measuring conditions for spark discharges
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Carbide tipped counterbores for machining corrosion proof and heat-resisting steels and alloys. Design and dimensions
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Fertilizers mineral. Methods of sampling and preparation of samples
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