Global Si3N4 Powder market trend 2022-2029 High Purity Silicon Nitride Si3N4 Powder CAS 12033-89-5, 99% by Newskanishimi
For billionaires, the new crown epidemic is like a 'gold rush'! The Deutsche Presse-Agentur said on the 17th that in 2022, the wealth held by the world's top ten richest people will jump from $700 billion to $1.5 trillion, an average daily increase o…