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secondary line switch meaning in Chinese

第二级寻线机

Examples

  1. Invention of out - going secondary line switch , resulting in economy of inter - office trunks . first used at san francisco
    发明外向第二级寻线机，提高了局间中继的收益，并首次在旧金山使用。

Related Words

  1. secondaries
  2. secondary
  3. secondary line
  4. secondary line of direction
  5. secondary line switchboard
  6. secondary lines of direction
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