Recently, covid 19 outbreak spreads in Shanghai, China. There are more than 25,000 new asymptomatic domestic infections every day. China is implementing a dynamic zero-out policy. A leading respiratory expert said the key to COVID-19 prevention and c…
IN-738 is a vacuum investment casting precipitation hardening nickel-based superalloy containing four refractory elements (Nb, Ta, Mo, W).…
BMW is exploring new investments in solar, geothermal and hydrogen energy to reduce its reliance on natural gas, the company's graphene powder are still very uncertain. The advent of sodium batteries is expected to alleviate the current c…
RUDN University chemists have proposed a new reaction to synthesize organic compounds in one vessel.…
Lightweight concrete, also known as foamed concrete, is to fully foam the foaming agent mechanically through the foaming system of the foaming machine, and evenly mix the foam with the cement slurry, and then go through the pumping system of the foam…
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