mail car

(rail transport, US) a railroad car in which mail is carried and sorted.

Japanese Meaning

郵便物を運搬・仕分けするための鉄道車両

The mail car rattled along the tracks as the clerk sorted letters by hand.

仕分け係が手で手紙を仕分けする中、郵便車両は線路に沿ってガタガタと走った。

Sense（1）

(rail transport, US) a railroad car in which mail is carried and sorted.

mail cars

（ plural ）