ultra low-volume

The types, principles, features, and applications of displacement sensor used in ultra-low frequency active vibration isolation control are introduced.

介绍了超低频主动隔振控制中常用的位移传感器的类型、工作原理、结构特点及适用范围。

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Even as the economy appears to be on firmer footing, the central banker has held his course toward keeping short-term interest rates ultra low until at least the end of 2014.

即便如今经济增长看来有了更为坚实的基础，这位央行行长仍坚持至少在2014年底前保持超低短期利率。

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The traditional traveling-wave differential protection cannot be applied to ultra/ extra high voltage transmission line with shunt reactor, so this paper describes a novel differential current expression. Based on traveling-wave differential protection a new scheme with low proportional restraint characteristic is presented.

传统的行波差动保护无法应用于带并联电抗器特/超高压输电线路，为此给出了一种新的行波差流表达式，并据此提出一种具有轻微比例制动特性的行波差动保护实用方案。

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Study on Vibration Sensor of Ultra-low Frequency

超低频振动传感器的研究

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Study on Ultra Low Frequency Vibration Sensor by Using Magnetoelectric Speedometer

用磁电式速度计实现超低频振动传感器的研究

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