mail train

train that is used for transporting mail

A Travelling Post Office (TPO) is a type of mail train where the post is sorted en-route.Mail was first sorted on a moving train in a converted horse-box on the Grand Junction Railway, England, in January 1838, at the suggestion of Frederick Karstadt, a Post Office surveyor. Karstadt's son was one of two mail clerks who did the sorting. In 1845 the service was extended via Derby to Newcastle upon Tyne by the Midland Railway and soon after reached Scotland.
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Noun
1. a train that carries mail
(hypernym) train, railroad train
(member-meronym) mail car

n.
ڈاک گاڑي

mail-train /'meiltrein/
danh từ xe thư (xe lửa)
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