1.The temperature of the oven is rised by the coal.

2.temperature suitable range:room temperature~280℃.

3.spring treat time:one hour for the cold stove,45 minutes for the hot stove.

4.It cost 10kg material for 10000 springs..

5.The oven can be matched with environment-protect filter.after use it,the black

smoke changes to white smoke,and the dust and spark reduce.