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A hole in a sheet made by one of the points of a tympan.
Late 18th century; earliest use found in Philip Luckombe (d. 1803), printer and writer.
雅致网英汉双解词典包含236457条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。