The architecture of metro optical network, networking principles and the selection of optical fiber cable are discussed in accordance with metro network positioning and function.
根据城域网的定位及作用，对城域光网络的结构、组网原则和光纤选用等问题进行了讨论。
How to plan and design the artificial island withworld's top architects and engineering and technological enterprises from the perspectives of theproject's stated positioning and function?
如何从既定的定位和功能的角度，与世界顶级建筑师和工程技术企业一同规划和设计人工岛项目？
The controller can finish the functions of fine turning, positioning, searching and tracking by pressing corresponding function keys.
选择相应的功能键，可完成微动、定位、搜索和跟踪等功能。
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