Na Septemba 25, 2019, na ụbọchị ọmụmụ 70th nke ala nna, Duan Yuning, odeakwụkwọ otu na osote onye isi oche nke National Institute of Metrology, China, Yuan Zundong, onye isi ihe, Wang Tiejun, onye osote onye isi ụlọ ọrụ Thermal Engineering Institute. Jin Zhihun, odeakwụkwọ Gene...
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