A chalk line is a simple tool used to mark straight lines on surfaces for construction or woodworking tasks. It consists of a string coated with powdered chalk inside a case, which also serves as a reel. To use it, the string is stretched tightly across the surface and snapped, leaving a straight chalk mark. Chalk lines are helpful for creating guides for cutting, aligning materials, or laying out designs. They are commonly used on walls, floors, or boards where precise, straight markings are needed.

英語での「chalk line」の定義と意味

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