精品欧美一区二区三区久久久小说,国产一级一级毛片女人精品,一级毛片免费不卡在线,一级毛片免费大片,不卡中文字幕av,中文字幕不卡,国产伦精品一区二区三区视频黑人

◇ Product Introduction ◇ Product Features◇ Technical Indicator

[Product Introduction]

The standard platinum resistance thermometer is an interpolation instrument that transmits the international temperature standard in the range of 13.8033K-960.78℃. It is used as a standard when verifying various standard thermometers and precision temperature measuring instruments. It can also be directly used for high-accuracy measurement in the above temperature zone. The standard platinum resistance thermometer measures temperature according to the law that the resistance of metallic platinum changes with temperature.According to the regulations of ITS-90, T90 is defined by platinum resistance thermometer in the temperature range from the equilibrium hydrogen triple point (13.8033K) to the silver freezing point (960.78℃). It uses a set of defined fixed point and reference functions as well as interpolated temperature deviation functions to index. The above-mentioned temperature zone is further divided into several temperature zones, and a sub-temperature zone that can work normally is determined by thermometers of different structures.

[Technical indicators]