该接口利用微型计算机技术从HJ—921型交换机的公共控制设备采集,并向农村支局自动交换机转发被叫用户号码。
Making use of microcomputer techniques, the interface collects information from common control exchange HJ-921 and repeats called subscriber number to rural telephone exchange.
科学家认为,公共广播系统、扩音器、自动门等利用超声波控制的设备日益增多,可能会导致“超声病”的流行。
Scientists say that a boom in public announcement systems, loudspeakers and automatic doors may be spawning an epidemic of ultrasonic sickness.
水电站综合自动化系统(包括电站机组、变压器、厂变、公共设备的保护、检测、控制等)是电站安全、高效运行的重要保证。
Integrated Hydraulic power plant automation system is an important assurance for the safe and high efficient working of power plant.
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