... silicious material, calcium material and reforcing fiber through the process of slurrying,forming,high pressure steam curing, drying, ... 08% (GB/T7019-1997)Radioactivity: In line with the standard, A-class product, no pollution in production, marketing and application (GB6566-2000 ... or MRT stations and so on.If you are interested in our products,please let us know. ( function(){ var aBigImageSrc ...