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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Post office machines:

SORTERS: Post-office machines
SCALE: Post-office machine
SCALES: Post office machines
METER: Post office machine
DATERS: Post office machines
DATER: Post office machine.
SORTER: Post office machine
SORTERS: Some post office machines
MAILSORTER: Post office machine