functional block短语¹⁴⁴⁹⁷²⁺² 基本例句 功能块 A soft starting controller of the asynchronous mot or based upon PIC microprocessor is proposed and the operational principle of the controller, functional block diagram and flow chart are given. 提出一种以 PIC单片机为控制核心的三相异步电动机软起动控制器，阐述了该控制器的工作原理、回路结构图和软件程序结构。 cnki