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| Optical MEMS pressure sensor using ring resonator on a circular diaphragm Recent countries visiting this post | |
| 16 | United States |
| 5 | Germany |
| 3 | Canada |
| 2 | Japan |
| 2 | Iran, Islamic Republic of |
| 1 | United Kingdom |
| 1 | India |
| 1 | |
| 1 | Thailand |