“national prototype of the kilogram”的概念、定义、翻译、参考文献-科学参考

单词	national prototype of the kilogram
释义	national prototype of the kilogram Encyclopedia 工学质量计量技术释 national prototype of the kilogram1千克质量基准砝码中国在1965年从国际计量局得到砝码器号是60号的国家千克原器。
随便看	ultrasonic amplification effect ultrasonic anemometer ultrasonic anemometers ultrasonic-assisted electrical discharge machining ultrasonic-assisted extraction ultrasonic-assisted grinding ultrasonic-assisted machining ultrasonic assited electrical discharge machining ultrasonication ultrasonic attenuation ultrasonic attenuation spectrum measurement in multi-phase flows ultrasonic backscattering ultrasonic bioeffect ultrasonic bioeffects ultrasonic biophysics Ultrasonic Bonding ultrasonic bonding ultrasonic cavitation ultrasonic cleaner ultrasonic cleaning ultrasonic coagulation ultrasonic couplant ultrasonic couplant, ultrasonic coupling agent ultrasonic coupling agent ultrasonic cutter

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