| 摘要 |
A furnace has a dual structure for carbonizing material. The furnace has a group of inner chambers and an outer chamber. Each of the inner chambers has a lid which can open and close to input the material for carbonizing. The outer chamber moves so that the group of inner chambers is housed in the outer chamber. Due to this, a combustion space is formed between the group of inner chambers and the outer chamber so as to heat each of the inner chambers to dry the material by distillation.
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