|
|
/ |
00 |
Radioactive sources (producing neutrons or other subatomic particles, X- or gamma rays, in fusion reactors G 21 B, in nuclear reactors G 21 C, by cosmic radiation G 21 H 7/00, in accelerators
H 05 H; X-ray tubes H 01 J 35/00; gamma masers H 01 S 4/00) [2] |
|