Yellow powder, tungssten trioxide. Tungsten trioxide, yellow powder, insoluble in water. Soluble in alkali. This is used for the manufacture of high melting points alloys and hard alloys, as well as tungsten wire and fireproof materials. Color: yello…
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…
Fatih Birol, executive director of the International Energy Agency (IEA), said Wednesday that the European Union could face a shortage of about 27 billion cubic meters of gas in 2023, or about 6.8 percent of the bloc's benchmark total gas demand.…
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