Use caution, porcelain body or the coating of brick bottom, which has high content of low-melting oxide and fuel which has more impurity, that all can corrode the roller.

• 富含碱性氧化物成分的瓷砖坯体或砖低涂料，以及杂质含量高的燃料,都可能侵蚀辊棒，须谨慎使用。