Technical requirements for toll manual switching equipment 長途人工電話交換設備.技術要求
Specification for lever - operated manual switches for aircraft 飛行器用杠桿操作的手控開關規范
In communications , a manual switching system where incoming messages to the switching center perforate paper tape 在通信技術中,一種人工信息報文交換方法,即進入交換中心的(信息)報文用手工在紙帶上穿孔。
In order to adapt well to the development of the overhaul with the locomotive , the article introduces a digital auxiliary motor test - bed based plc and touch screen technology , being an updated product of routine manual switch and relay - controlled test - bed , it can accomplish the functions such as testing , checking and other manipulations to d . c engine , a . c engine and phase converter through hmi - touch screen 為適應機車檢修水平現代化的發展步伐,本文研究設計了基于plc和觸摸屏技術控制的機車數字化輔機試驗臺,作為常規的手動開關和繼電器控制試驗臺的升級換代產品,通過人機界面( hmi ) ? ?觸摸屏完成對直流電機、交流電機、劈相機的試驗檢測操作。