1.DuoZhong groove design 2.High strength, good heat resistance 3.Reduce the processing road after cost 4.Mo to stone material Ceramic filter mullite stone material qualitative to give priority to, USES the straight KongShi parallel ended at the, DuoZhong groove design, to ensure that the products of the high strength and heat resistance, and at the same time, can guarantee the casting time, use ...