On July 22, a shocking "Transformers" short film was shown on the LED screen of the hall of the China Film Museum. The reporter w…
UV product bactericidal efficacy
Ultraviolet light can emit ultraviolet light with a wavelength of 253.7 nm, which is most easily absorbed by proteins and nucleic acids of bacteria and viruses, denature and dissociate proteins, form thymine dimers …
It is understood that the "Planning" has conducted an in-depth analysis of t…
Current nickel extraction process metallurgical industry to fire and wet refining process of combining mainstream. Structure 1996 World nickel products are shown in Table 1, wherein only the nickel carbonyl and …
Navistar, a company with a hundred years of history, casually enters your sight as a calm attitude. From the 1953 edition of the renminbi, the liberated brand car actually originated from the Navistar International brand K-series trucks . Now it is i…
In order to study the influence of acceleration on the internal ballistic performance of solid rocket motors, the combustion experiment must be performed in a set acceleration field environment. During the experiment, the frequency converter is first operated to make the transmission shaf…