The CATV charge and control system is mainly composed of the management software, the header data modulator and the terminal charge and control equipment.

CAT V收费控制系统中我们项目组完成了系统软件设计、前端数据调制器、终端收费控制器的开发工作。

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Synchronous closing is an intelligent control technique. It can make the moving and stationery contact-header of circuit breaker to close on the specified phase angle of the power system voltage wave.

同步关合是指断路器动、静触头在系统电压波形的指定相角处关合，以减小合闸操作的过电流和过电压的一种智能操作技术。

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Sendmail's new NT 3.0 product provides NT administrators with security features, like header scanning, relay access control, and better defenses against theoretical attacks, to which Unix and Linux system administrators are already accustomed.

CNN: Sendmail brings open source technology from Unix to NT