The key features of the international system are decimalization , a system of prefixes , and a standard defined in terms of an invariable physical measure 国际制度的主要特点是采用了十进制法、字首体系、以不变的物理度量方式解释的标准。
2.
Microcomputer inputs data document and sends out electric current signal to control wind velocity according to the setted value of speed . the major work of single - chip microcomputer is to get electric current signal from microcomputer and transfer the signal into decimalization ascii then send to show Pc机把采集来的数据文件调入，按照设定的速度，给下位机(单片机)发送一个控制风速的电流值，并且在pc机的界面上画图，显示发送数据的大小。
