Ọ bụ mpi ịnata foto ndị a n'aka ndị ahịa. Dabere na mma ejiri n'aka, a maara akara Zhongrui nke ọma na ụlọ na mba ofesi. The tubes nwere ike ọtụtụ-eji dị iche iche ọrụ, dị ka semiconductor, hydrogen gas, ụgbọala, nri na ihe ọṅụṅụ wdg igwe anaghị agba nchara enweghị nkebi tubes nwere ma ...
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