How to flexibly use the normal opened contact and normal closed concoct to bring about multifunchonal controlling are emphatically described.
重点阐述了如何灵活运用晶体管液位控制器的常开接点、常闭接点，实现多种控制功能，达到为黄金生产服务的目的。
Causal analysis of abnormal start-up of oil drivers for steam inlet valves of 600 MW supercritical steam turbines and relevant treatment;
600 MW超临界汽轮机进汽阀油动机异常开启的原因分析及处理
A carbon nanotube-based normal on under-gate field emission display panel;
一种基于纳米碳管的常开型后栅极场致发射显示板