Ka duba nassi da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar nassi: Passage: ERWs sune thermonuclears masu matakai biyu tare da cire duk uranium mara mahimmanci don rage karfin fission. Fusion ya ba da neutrons. An haɓaka su a cikin shekarun 1950, an fara tura su a cikin shekarun 1970, ta sojojin Amurka a Turai. An yi ritaya na ƙarshe a cikin shekarun 1990. Tambaya: menene ERWs?
matattarar thermonuclear mai matakai biyu