dry chemical短语⁹⁶⁶⁷⁷⁺⁶ 基本例句 干粉灭火剂 Based on the study of signal detection, data transmission, fire alarm system, we design a signal feedback system for automatic pulse dry chemical fire extinguishing equipment. 本文通过对脉冲干粉自动灭火系统信号检测、数据传输和声光报警的研究，设计出适用于脉冲干粉自动灭火装置的信号反馈系统。 dictall