Electrical apparatus for the detection and measurement of flammable gases. Part 3. Performance requirements for group I apparatus indicating a volume fraction up to 100% methane in air
State system for ensuring the uniformity of measurements. State special standard and state verification schedule for means of measuring instruments of periodical pressure over the range 1-250 MPa at frequencies up to 10 kHz
Environmental protection. Biological diversity. Methodology for the formation of indicators of biodiversity conservation program of a commercial organization
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