Natural gas. Determination of composition by gas chromatography method with evaluation of uncertainty. Part 1. General guidelines and calculation of composition
State system for ensuring the uniformity of measurements. Ultrasonic medical physiotherapy equipment. General requirements to measurement methods of acoustic output in the frequency range 0,5 MHz to 5,0 MHz
General requirements for machines, instruments and other industrial products and calculation methods for their complex structures as to seismic stability
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