direct flow短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 直通流量 On the basis of no outer direct flow power source, tow-wire passive LED local displaying unit realizes LED local displaying of industry parameter which tow-wire transmitter inspects. 二线无源 LED现场显示单元是指在不外接直流电源的前提下，实现二线制变送器检测到的工业参数 LED现场显示。 cnki