| 1. | This compass serves as a protractor .
这个罗盘可用作分度规。
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| 2. | Specification for protractors for drawing office use
制图室用分度规规范
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| 3. | Verification regulation universal bevel protractors
万能角度尺检定规程
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| 4. | Specification for bevel protractors mechanical and optical
斜量角规
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| 5. | A discussion on experiment by demonstrating a protractor for radian
浅议弧度制的演示实验教学
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| 6. | Vernier universal bevel protractor
游标万能角度尺
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| 7. | Dial universal bevel protractor
带表万能角度尺
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| 8. | Draughting instruments with or without graduation . part 2 : protractors
带刻度或不带刻度的绘图仪器.第2部分:量角器
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| 9. | Drawing ruler - protractor
绘图仪尺.量角器
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| 10. | Air navigation protractor
空中导航用量角器
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