| 摘要 |
A ruler main body is formed by attaching the respective interlayer plates to both surfaces of a center plate, a ruler section is formed at the corners of the ruler main body, a position determining plate is established which extends from the center plate along two sides of the ruler main body which lies between the ruler section and projects beyond the surface of the ruler main body, and position determination is performed by abutting the position determining plate to two edges which the corner of the object to be cut lies between.
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