This paper introduces briefly the application of programmable controller in travel control system of Mine hoist, and gives out the system hardware and software design.

简要介绍了可编程序控制器在矿井提升机行程控制系统中的应用，并给出系统硬件配置和软件设计。

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But delays and inefficiencies in air travel are due in large part to an outdated traffic-control system that still relies on slow, ground-based radar stations and repetitive voice communication.

不过航空运输延迟和低效的主要原因还是过时的空中交通管制——一套依靠地面控制、反应迟缓的雷达站和不断重复的语音通讯建立起来的体系。

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The control cable system must be displaced full travel in each direction for complete inspection at fairleads, air pressure seals, grommets, quadrants, drums, and over pulleys.

控制用线缆系统在全套检查的时候，导缆器，气压密封件，金属扣眼，象限仪，鼓，和滑轮等处，都应该在每个方向都进行偏转到头的移位测试。

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The American Jobs Act includes an immediate investment in employing construction workers to restore 150 miles of runway at American airports and put in place a next-generation air-traffic control system to reduce travel time and delays.

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Of course, a great leap toward alleviating our aggravating air travel experiences would be to remove the air traffic control (ATC) system from the auspices of the Federal Aviation Administration (safety oversight would remain with the government).

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