| Subject | English | German |
| radiat. | primary ionization | primäre Ionisation (also in a counter tube) |
| radiat. | primary ionization | Anfangsionisierung (also in a counter tube) |
| radiat. | primary ionization | Anfangsionisation (also in a counter tube) |
| phys. | primary ionization | primäre Ionisierung |
| earth.sc. | primary ionization | Primaerionisation |
| tech. | primary ionization | Primärionisation |
| phys. | primary ionization | primäre Ionisation |
| radiat. | primary ionization | Primärionisation (also in a counter tube) |
| health. | primary ionizations | Primärionisationen |
| phys. | primary specific ionization | spezifische Primärionisation |
| tech. | specific primary ionization | spezifische Primaerionisation |