Ruling pen
01
绘图笔, 直线笔
a specialized drawing tool with adjustable metal blades or prongs that can be set to a desired width
例子
During the drafting class, students learned how to use a ruling pen to create clean and crisp lines for engineering diagrams.
在制图课上，学生们学习了如何使用直线笔为工程图创建干净而清晰的线条。
