介绍了一种多用途水声信号预处理机的具体设计，详细阐述了各模块电路的设计原理及工程实现，给出了部分电路的原理图。

A design of a multi-purpose hydro-acoustic signal preprocessor is introduced. A detail expatiation of the design principle and engineering realization of the modular circuits are given.

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文章详细分析了基于蓝牙模块的数据通信系统构成，着重介绍了使用HCI状态机的处理机制来实现HCI驱动的方法。

This article analyses the structure of data communication system based on Bluetooth module in detail, and emphasizes the method of realizing HCI drive using the mechanism of HCI state machine.

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本文论述STD 总线双机容错系统的设计与实现，该系统为工矿企业提供高可靠性的处理机模块。

This design and implementation of a double modular. fault-tolerant computer sys-tem interfacing to STD-BUS is presented for the industrial process oriented processor withhigh reliability.

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