Patent:CN2383699U
Patent: | CN 2383699U |
Title: | PLane-type Ellipsograph |
Date: | 21.06.2000 |
Place: | |
Country: | China |
Person: | Qian Zhisheng , Wang Huizhen |
Company: | |
Internal Links: | Ellipsograph |
Keywords: | |
Link to the patent office: (without guarantee) | ![]() |
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