international ohm 国际欧姆 international practical temperature scale 国际实用温度刻度 International Press Telecommunication Council 国际新闻通信委员会 ..
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N a temperature scale adopted by international agreement in 1968, and revised in 1990, based on thermodynamic temperature and using experimental values to define 16 fixed points. The lowest is the triple point of an equilibrium mixture of orthohydrogen and parahydrogen (–259.34°C) and the highest the freezing point of copper (1084.62°C) 国际实用温标
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