短語詞組短語automatic telephone switching system 自動電話交換系統(tǒng);自動manual telephone switching system 人工電話交換機(jī)Public Telephone Switching System 交換機(jī)mobile telephone switching system 移動電話交換機(jī)toll telephone switching system 長途電話交換機(jī);長話交換機(jī)local telephone switching system 市內(nèi)電話交換機(jī);地區(qū)電話交換機(jī)STEP TELEPHONE SWITCHING SYSTEM 步進(jìn)制電話交換機(jī)SOHO TELEPHONE SWITCHING SYSTEM 求電話交換機(jī) 返回 telephone switching system