The existing tap - changers are almost contact switches for the machinery type 現(xiàn)有的分接開關絕大多數(shù)為機械式有觸點開關。
Exhibit working knowledge of the functions of basic sensors ( optoelectronic , sonic , contact switches ) and actuators ( motors and motor controllers ) and the limitations and advantages of each in mechanical design 對基本感測器(光電的、聲控的和觸發(fā)的開關)和執(zhí)行器(馬達和馬達控制器)及它們在機械設計中各自的局限與優(yōu)勢展現(xiàn)出工作知識。
The main loop of the welder uses a thyratron transistor non - contact switch circuit , quick and reliable close time , accurate timing of welding , high precision of welding , good repeatability , bring a high quality welding 焊機主回路采用晶閘管無觸點開關電路,關斷時間快、可靠,焊接定時精確,焊接精度高,重復性好,可實現(xiàn)高品質焊接。