市电电源

Therefore, this thesis raises "commercial power and DC remote power supply" which is off-line power mode of Uninterruptible Power Supply to resolve the problems of PAS CS power failure.

为此本文提出以"市电+直流远程供电"离线式UPS电源，解决小灵通基站停电问题。

No utility service is present in typical prime power applications.

通常在没有市电供应，发电机组作为首要电源的场合使用。

No utility serice is present in typical prime power applications.

通常在没有市电供应，发电机组作为首要电源的场合使用。

To enhance the reliability of the power system, feeders of generators should be connected to the ATSE gears in the electrical switchgear rooms.

为提高可靠性，应急发电机供电应引至市电低压双电源切换柜。

Its feasibility is tested and verified by experiments in an unshielded environment.

提出了一种抑制市电对高温SQUID磁强计干扰的电源平衡方案，并且用在无屏蔽环境中的实验证实了它的可行性。

High frequency emergency lighting apparatus for telecommunication power system is proposed in this paper. The proposed circuit configuration comprises an electronic ballast, a line voltage detector, and a charger/discharger. To compact the system structure and raise the efficiency, the class E inverter and bi-directional converter are employed, respectively.

本文中主要提出一种应用於电信电源供应系统之高频紧急照明装置，所提之架构包括采用E类换流器为主电路之电子安定器、市电侦测电路及单级双向充放电电路，其主要特徵是电路简单、维修容易且具高效能。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。