An opisometer also called a curvimeter meilograph or map measurer is an instrument for measuring the lengths of arbitrary curved lines. Close-up view on white background.
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- 大图:3000 × 2000 像素·25.4 cm × 16.93 cm·300dpi·JPG
- 中图:1000 × 667 像素·35.28 cm × 23.53 cm·72dpi·JPG
- 小图:500 × 333 像素·17.64 cm × 11.75 cm·72dpi·JPG