subscriber trunk dialling

名词 n.
中文释义

英文释义

名词 n.
  1. A system of automatic connection of trunk calls through dialling a phone number without operator assistance. UK,uncountable
    — This NER microwave radio telephone link will bring subscriber trunk dialling facilities to no fewer than 3,000 railway telephones at York, Newcastle, Darlington, Middlesbrough and Leeds and points as far north as Berwick-upon-Tweed.
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