国产精品乱码成人αV精品_日韩成人午夜福利_国产精品日韩在线制服丝袜_国产TS三人妖大战直男_极品丰满尤物少妇_榴莲app今日更新_午夜在线播放免费人成国语_av中文版免费观看_久久av无码精品一区二区三区_亚洲色大成网www国产

The specific gravity of zinc oxide after high-temperature calcination (calcination temperature at 1250 degrees Celsius, Xinfengrun firing curve) will increase to 2.0 to 2.5. The use of glaze in the glaze is good, no thixotropic, no pinhole, can increase the speed of the kiln High yield bricks. Zinc oxide that is not calcined or whose calcining temperature is not enough and whose specific gravity is not enough will affect the process performance of the glaze and reduce the production stability.