A metric systemofmeasurementunits based upon the meter (length), gram (weight), second (time) and amperes (electrical current).
基于米(长度)、克(重量)、秒(时间)和安培(电流)的一种测量单位公制系统。
2
The International SystemofUnits and other units of measurement adopted by the State shall be the national legal units of measurement.
国际单位制计量单位和国家选定的其他计量单位,为国家法定计量单位。
3
Based on this mathematics model, the optimum signal-processing circuit, having high reliability and high stability, is designed and applied to the automatic measurementsystemof the focusing units.