Under the OSSS contract, Harris provided operations, maintenance and support services to the Air Force Satellite Control network and Global Positioning System ground networks.
根据这份OSSS合同，哈里斯公司为美国空军卫星控制网络和GPS地面网络提供了运行、维护和支持服务。
Plan system maintenance and implement effective change control
计划系统维护和实施有效的变更控制
The site operation proves that the equipment is reliable and capable of carrying out the measuring, control and device management and maintenance functions together with automation system.
现场运行证明，该装置运行可靠，并能配合自动化系统完成测量、控制和设备的管理维护功能。
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