This digitalized optical fiber transmission system is upstream line of the bi-directional optical fiber transmission system.
数字化光纤传输系统，为有线制导光纤传输系统的一个部分；
An interface formed by joining the ends of two optical fibers in a coaxial (in-line) butt joint for direct fiber-to-fiber transmission.
为使光纤对光纤直接传输，将两根光纤的端面以同轴对接方式进行连接所形成的一种界面。
The main development trend of high voltage transmission line's protection is the line fiber optical differential protection.
光纤电流差动保护是高压线路主保护的发展趋势。
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