本文介绍了一种简单的“抑制型”压电晶体速率陀螺，概述了它的电路结构和主要性能。

In this paper, a simple "cancelled type" PCRG (Piezocrystal rate gyro-scope) is described. Its essential performance and its circuit configuration are also outlined.

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本实用新型涉及一种双极式超声波换能器，它由紧固件、反射板、压电晶体、单向输出板、振荡放大电路等组成。

The utility model relates to a two-polarity ultrasonic transducer, composed of a fastener, a reflecting plate, a piezocrystal, a sound direction output plate, and an oscillation amplifying circuit.

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