Nisshin стали рекомендованы огнеупорный кремния контро-

Tis silica refractory checker brick has three charactoristics : 1.three high : high density for good thermal conductivity ,high RUL(refractorienss under load,high trydimite contern 2.four low :low true density,low thermal expansion ,low creep ,low residual quartz 3.one good : accurate size and pure color made the good outlook It isgained high -tec product of Henan province and awarded second-class science and technology progress prize of Henan province in 2004.