底燃火炉，自动填煤火炉：一种带有漏斗的煤炉，当下层燃料燃尽时，它会自动地从上面补充。
A coal stove with a hopper that automatically replenishes itself from above as lower layers of fuel are consumed.
底燃火炉，自动填煤火炉：一种带有漏斗的煤炉，当下层燃料燃尽时，它会自动地从上面补充。
A coal stove with a hopper that automatically replenishes itself from above as lower layers of fuel are consumed.
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