Compass capable of reading

The utility model discloses a novel compass which can be modified based on a conventional vernier caliper and realizes accurate reading by means of the existing readings on the vernier caliper. The compass capable of reading includes a main ruler and a vernier frame, the vernier frame is jointed on...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: RU ZHONGHE, ZHANG XINPIN
Format: Patent
Sprache:chi ; eng
Schlagworte:
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