pneumatic post

名词 n.
中文释义

英文释义

名词 n.
  1. A postal service delivering messages through pneumatic tubes. countable,uncountable
    — Long before email and SMS, the pneumatic post was the quickest way to send a written message of condolence, a declaration of love or even a demand for ransom. Systems for delivering messages through tubes by the force of compressed air originate in experiments undertaken by George Medhurst and William Murdoch at the turn of the nineteenth century.

词形变化

pneumatic posts plural
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