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…
Nanotechnology refers to the science and technology that create single-atom and single-molecule substances. It studies the properties, and uses of materials with a structure size ranging between 1 and 100 nanometers. The process of studying the compo…
A new type of superplasticizer polyoxyethylene-ether macromonomer is known as concretewater reducer. This superplasticizer uses polyoxyethylene-ether macromonomer as well as unsaturated and sulfonic acids group monomers by radical polymerization. You…