... polycrystalline silicon stove thermal; Vacuum serial products and so on heat-treatment furnace, metallurgy tower electric muffle furnace necessary plate, rods ... and bars, crucible, heater, crucible request, conduction current tube, heat preservation tube, boat pan, fastener, electrode. Model Apparent Densityg/cm3Bending ... ,Kaifu District, Changsha City,Hunan,China C/C Materials of high temperature