A tool or machine that makes holes, or perforates, materials such as paper and card.(noun)
A machine that can bore a tunnel underground.(noun)
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Use "perforator" in a sentence
"This was done in a special machine of Edison's invention, called a perforator, consisting of a series of punches operated by a bank of keys -- typewriter fashion."
"The piles are constructed by first ramming a hole in the ground by repeatedly dropping a conical "perforator" weighing some two tons."
"The view Fig. 52 shows the "perforator" and the tamping apparatus at work."