| Authors | David A. Johnson |
| Main Document | Article «Piezoelectric vibration sensor activates switch» |
| Description | Figure |
| File Format / Size | PDF / 19 Kb |
| Document Language | English |
| Authors | David A. Johnson |
| Main Document | Article «Piezoelectric vibration sensor activates switch» |
| Description | Figure |
| File Format / Size | PDF / 19 Kb |
| Document Language | English |