... which has such advantages as light in weight, waterproof, anticorrosion and good plasticity. Filling in glass fiber, it can be produced ... metal oxide can be synthesized to dental stocker which has good pressure resistance and phystolotgic adaptability. Moreover, we can ... resin, ion-exchange resin and surface active agent, a good plasticizer in plastics, materials of mesaconic acid and its anhydrinde, ...