Power supply systems based on renewable energy sources for rural electrification. Part 9-6. Photovoltaic systems. evaluation and selection of individual stand-alone systems depending on the degree of providing electrical loads
State system for ensuring the uniformity of measurements. State primary standard and all-union verification schedule for means measuring mass flow of liquid within the range of 1x10 in minus 3 degree up to 2x10 in 3 degree kg/s
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