1. Resin bonded grinding wheels are made of resin, such as phenolic, epoxy, polyurethane, and polyvinyl alcohol.Resin bonded grinding wheels have high strength. At present, most resin bonded grinding wheels are not waterproof and cannot be ground with grinding fluids. Of course, some resin grin...
There are about 20 common amino acids. All the amino acids have a –COOH, -NH2groups and a –H bonded to a carbon. The carbon is a chiral carbon, and alpha amino acids are the most important in the biological world. The R group differs from amino acid, to amino acid. The simplest ...