PT-The shringkage cavity in brick disperses under the casting scar.
QX-The shringkage cavity in brick disperses at one end of the brick,a completely dense zone forms at another end.
ZWS-This casting method is similar with "ws",merely a few shrinkage voids remain in upper part of the body.
WS-No shrinkage cavity exists in brick body.

TYR processes the advanced analytic and test equipment,which test material,melt in furnace,final product and assure quality in the cortrol of manufacture in process.