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UPS primary circuit and its switching circuit are analyzed, optimization solution is recommended.
分析比较UPS一次及其配电电路，推荐优化方案；
A switching circuit, method and control unit (1) for controlling electric power supply for lighting fixtures.
一种用于控制用于照明设备的电源的开关电路，方法和控制单元(1)。
Tellabs' equipment was designed for an era of circuit switching.
FORBES: Survival technique: paranoia
Tellabs is good with one aspect of circuit switching.
They then analyze how the remaining major cost components, switching and transmission for both types of networks and interconnecting with the switched circuit network for the IP-based networks, change with the change in technology.
CNN: IP telephony is the "in" thing these days, but should it be?
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