dial backup

常見例句

雙語例句

• The Sequencing or Line Replenishment Operator shall provide a phone extension to be used for dial backup of the primary data communications link.
  排序或線路補給操作員應提供一個電話分機，以便聯(lián)系主要數(shù)據(jù)通訊聯(lián)接的后援。
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