The paper presents the work rule of the QJR1-300/1140 flame proof and intrinsica lly safe type alternating current soft starter,main technical target,rate,curr ent double rings system,and installation,test and usage
介绍 QJR1-300/1140 矿用隔爆兼本质安全型交流软启动器工作原理、主要技术指标、速度和电流双闭环系统,介绍现场安装、调试及使用。
Abstract : The paper introduces a new deactivating method for metal chromatographic column tube . Polypyrrones ( PY ) is used as the deactivating reagent . The deactivated column tube , obtained