另一方面，现场控制层作为企业整个信息系统的底层部分，必然需要与生产过程管理层和经营决策层进行集成。
On the other hand, field-control layer, as the ground floor of corporation information system, must be integrated with manufacture process managing layer and operating layer.
使得港口经营业务管理信息系统（MIS）在语音、视频和数据三合一的无线网络通讯平台上，将移动计算机终端拓展到港口码头前沿的作业现场。
By supporting on the platform of wireless network communication combined with audio, visual, data, the port MIS spreads the mobile computer terminals into the operation site of port front.
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