Why There Is A Helium Shortage
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5 سال پیش
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What do balloons, MRIs and
What do balloons, MRIs and rockets all have in common? They all rely on helium — and the global market for the noble gas has been deflating for years.
5 سال پیش
در تاریخ 1398/03/31 منتشر شده
است.
16
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