海词手机词典

SDH has the unified network node interface (NNI), standardized information class structure in all the world and can be compatible with PDH, which makes all the transmission network systems can communicate with each other on the level of STM-N.

播放读音 播放读音

以上内容独家创作,受著作权保护,侵权必究

海词词典,十七年品牌