A ruling pen is a tool used for drawing straight lines or creating fine, precise lines with ink or other liquids. It consists of a metal nib that can be adjusted to control the width of the line by changing the gap between the two nibs. Ruling pens are often used by illustrators, architects, and graphic designers for tasks that require consistent, straight lines or detailed work. The tool can be used with ink, watercolor, or other media, making it ideal for technical drawing, architectural plans, and decorative art.

英語での「ruling pen」の定義と意味

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