Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Passage: US mepụtara usoro mmepụta Girdler sulfide chemical exchange process <unk> nke e gosipụtara na nke mbụ na nnukwu ụlọ ọrụ Dana, Indiana na 1945 na Savannah River Plant, South Carolina na 1952. DuPont rụrụ ọrụ SRP maka USDOE ruo 1 Eprel 1989, mgbe Westinghouse weghaara ya.  Ajụjụ: Olee mgbe Dupont rụrụ ọrụ maka USDOE?
Eprel 1, 1989