per·fo·ra·tion /ˌpɝfəˈreʃən/
穿孔,貫穿,貫通
per·fo·ra·tion /ˌpɝfəˈreʃən/ 名詞
穿孔,穿破,穿孔術
perforation
打孔率
perforation
折頁線;打孔眼線 P
perforation
打孔
Per·fo·ra·tion n.
1. The act of perforating, or of boring or piercing through.
2. A hole made by boring or piercing; an aperture. “Slender perforations.”
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perforation
n 1: a line of small holes for tearing at a particular place
2: a hole made in something; "a perforation of the eardrum"
3: the act of punching a hole (especially a row of holes as for
ease of separation)