... the quality lightly , to bear the ablation, the heat-resistance to attack, the damage allowance well to be ... silicon stove thermal; Vacuum serial products and so on heat-treatment furnace, metallurgy tower electric muffle furnace necessary ... and bars, crucible, heater, crucible request, conduction current tube, heat preservation tube, boat pan, fastener, electrode. Model Apparent Densityg/cm3Bending ...