The heating element is screwed up by high resistance alloy wires and installed on the hearth's two sides, the rear wall of the furnace bottom and the furnacedoor.
加热元件的由高电阻合金丝绕制成螺旋状，安置在炉膛二侧，炉底后墙及炉门上。
2
The furnacedoor is opened or closed manually.
炉门的启闭是通过手动来进行的。
3
When the furnacedoor is opened, the power for the electric furnace is immediately cut off to guarantee the operators' safety.