Ruler for graduation centi

摘要

The present invention relates to a centimeter ruler used for measuring woven fabrics. In the centimeter ruler with its centimeters on both its top and bottom surfaces made of synthetic resin, its internal space is formed in length to form a hollow, and its top and bottom ends are closed. It is designed to provide a centimeter ruler with a fixed constant thickness by forming a groove in the middle of the upper surface to make a light and not bent centimeter ruler by air compression.