Random triples
| Subject | Object |
|---|---|
| gptkb:positron_emission_tomography | 1970s |
| gptkb:Lithium_iron_phosphate_battery | 1996 |
| gptkb:Silicon_Drift_Detector | 1983 |
| gptkb:Analytical_centrifuge | 1920s |
| gptkb:thin-film_cryotron | 1950s |
| gptkb:Ring_Imaging_Cherenkov_detectors | 1977 |