| |||
primary radiator | |||
radiator | |||
emitter | |||
β-ray radiator; source | |||
bomb; radiation source | |||
active source; radioactive source | |||
| |||
activity source | |||
| |||
gamma radiation emitter | |||
| |||
gamma-ray radiator | |||
| |||
bomb | |||
| |||
radioactive reference source | |||
| |||
beta-ray radiator |
放 射 源 : 65 phrases in 17 subjects |