| радиоакт. |
boron trifluoride counter tube; boron trifluoride filled counter tube; BF3 counter tube; BF3-filled counter tube; boron trifluoride filled neutron counter tube; BF3 filled neutron counter tube; boron trifluoride counter; BF3 counter; boron trifluoride neutron counter; BF3 neutron counter |
