... , cosmetic, etc with practice, is a multifunctional practice supplies. Meridians diagram, feel is real, is a beginner to improve actual operation ability ... artSilica gel (Silica gel, Silica) alias: silicone rubber is a kind of highly active adsorption material, belong to amorphous ... are silica, stable chemical properties, combustion. Silica gel is a kind of amorphous silica, should be controlled plant ...