... pottery and porcelain, and used to fill the fabric, paper, etc. Its solution is mixed with magnesium oxide, ... , ceiling, floor brick, magnesia cement, ventilation pipes, anti-theft covers, fireproof doors and Windows, fire prevention board, partition board, ... clay, high quality system of fire prevention board, magnesium magnesium packing, decoration board, light wallboard, abrasive, stoves, fireworks ...