裂解炉看火孔损坏原因及改进措施
Damage reasons for peephole of the cracking furnace and related mea-sures
陶瓷吸水性、毛体积比重、表观比重、表观气孔率测定方法（窑炉）观察孔，看火孔
Testing method for water absorption , bulk density , apparent specific gravity and apparent porosity of fired whiteware products observation hole
看火孔