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reference humidity
тех.	Bezugsfeuchtigkeit f
Английский тезаурус
reference humidity
авиац.	The relationship between temperature and reference humidity is defined as follows: — at temperatures at and below ISA, 80 per cent relative humidity, — at temperatures at and above ISA + 28°C, 34 per cent relative humidity, — at temperatures between ISA and ISA + 28°C, the relative humidity varies linearly between the humidity specified for those temperatures.