Which is the most economical fuel for home heating-gas, electricity, or oil?
哪一种燃料用作家庭暖气最经济煤气、电力还是汽油？
The heating furnace direct fuel compared with hot gas, can save energy economy after above 60%.
相比直接燃油的热加工炉，使用热煤气后可节省能源经济60%以上。
The heating furnace direct fuel compared with hot gas, can save energy economy after above 60%.
相比直接燃油的热加工炉，使用热煤气后可节省能源经济60%以上。
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