“line switching concentrator”的概念、定义、翻译、参考文献-科学参考

单词	line switching concentrator
释义	line switching concentrator [`līn ¦swich·iŋ `kän·sǝn´trād·ǝr] ^{COMMUNICATIONS} Switching center used between a group of users and the switching center to reduce the number of trunks and increase efficiency of switching equipment usage.
随便看	spectral pyrometer spectral radiance spectral radiance factor spectral radius spectral reflectance spectral regions spectral response spectral selective photoelectric effect spectral sensitivity spectral series spectral-shift reactor spectral temperature spectral theorems spectral transmission spectral type Spectra Pritchard photometer spectrobolometer spectrofluorometer spectrogram spectrograph spectrography spectroheliocinematograph spectroheliogram spectroheliograph spectrohelioscope

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