Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: ERWs sun kasance thermonuclears na matakai biyu tare da cire duk uranium da ba shi da mahimmanci don rage yawan fission. Haɗuwa ta samar da neutrons. An samar da su ne a shekarun 1950, an fara amfani da su ne a shekarun 1970, ta sojojin Amurka a Turai. Na karshe da aka yi ritaya a cikin 1990s.  Tambaya: menene ERWs?
matattarar thermonuclear mai matakai biyu