... is a kind of homogeneous material made by adopting a special high - temperature sintering process ... , therefore it is unnecessary to worry about damage caused by freezing and harmful penetration of rust, ... x 2,400mmb) 1,200 x 1,800mmc) 1,000 x 2,000mmd) 1,000 x 1,800mme) 900 x 1,800mmf) 900 x 900mmg) 800 x ... 800mmh) 600 x ...