英语词汇“ruling pen”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	ruling pen
释义	ruling pen noun : a draftsman's pen for ruling lines that has a pair of adjustable metal blades or points between which the ink is contained with the thickness of the line being regulated by a screw that closes the blades or allows them to open
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