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SF0319 / Growth ruler

SF0319
SF0319

The three-digit number can be recorded. The number can be changed according to the length of the scale.Card slot can be fixed scale length, and not easily retracted.The card slot can also hold the lowest end of the scale when not in use.

University

JiangSu University of Technology

JiangSu University of Technology
Chang Zhou, China

菲 邵,
JiangSu University of Technology