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Chapter 1191 Rare element
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... ntium and radium separated from the uranium mine can form a neutron source with strontium. There is no technical problem. It is purely the use of strontium to release a large number of neutrons when bombarded by a particle. It only takes effect when it is put together. All three are naturally occurring substances, and their feasibility is undoubtedly much higher than those of artificial elements that are extremely difficult to serve or require complex processes to produce.
As for Roland, ...
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