| its-90.com | |
| 网站标题： | The ITS-90 Resource Site, Temperature and Scales |
| 网站简介： | ITS-90.com, the resource site for temperature scales and temperature |
| 关键字： | international temperature scale of 1990 scales kelvin celsius kkts ITS-90 IPTS-68 temperature water triple point melting point freezing calibration thermometer metal fixed point cell metrology thermal |
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