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Patent:CN87215290u
| Patent: | CN 87215290u |
| Title: | Slide Rule For Calculating Biorhythm |
| Date: | 17.08.1988 |
| Place: | |
| Country: | China |
| Person: | |
| Company: | |
| Internal Links: | Rechenschieber |
| Keywords: | |
| Link to the patent office: (without guarantee) |  CN87215290u |
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