repeating optical transit 复测光学经纬仪
optical transit node 光过渡节点
optical theodolite optical transit 光学经纬仪
repeater optical transit 复测光学经纬仪
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"By bringing optical fibres in some of the networks, by just closing the loops, you will avoid excessive Internet transit costs, bringing down the cost by two-thirds, " he said.
UNESCO: Communication and Information
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