耐火材料,半鐵砂,棕(zong)(zong)剛(gang)(gang)玉(yu)(yu)AP砂,棕(zong)(zong)剛(gang)(gang)玉(yu)(yu)AF砂,亞(ya)白剛(gang)(gang)玉(yu)(yu),棕(zong)(zong)剛(gang)(gang)玉(yu)(yu)段(duan)砂,棕(zong)(zong)剛(gang)(gang)玉(yu)(yu)200目(mu)細粉