| 摘要 |
The gauge is designed to calculate the area consisted of lines on a plane using the principle of trigonometrical function. The gauge includes : a body (100); an operation member (200); a tracking member (300); a settling member (400); a fixed body (10); a ball bearing (11); an angle dividing plate (50); guide rollers (43, 43a, 71, 72); an angle scale (51); a length detective sensor (80); and a magnetic scale (90).
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