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Từ điển Oxford Learners Wordfinder Dictionary
perforation


noun
1. a line of small holes for tearing at a particular place (Freq. 1)
Derivationally related forms:
perforate
Hypernyms:
hole
2. a hole made in something
- a perforation of the eardrum
Derivationally related forms:
perforate
Hypernyms:
hole
3. the act of punching a hole (especially a row of holes as for ease of separation)
Derivationally related forms:
perforate
Hypernyms:
puncture

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