锶铁氧体是干粉末; 粒状大晶体，非金属矿物产品的制造（包括粘土，玻璃，水泥，混凝土，石灰，石膏和其他非金属矿物产品的制造。

DryPowder; PelletsLargeCrystals.Nonmetallic mineral product manufacturing (includes clay, glass, cement, concrete, lime, gypsum, and other nonmetallic mineral product manufacturing.