The indoor use of coal and biomass fuels for cooking and heating is a hidden killer. 室內使用的用來烹調和取暖的煤和生物量燃料是一個潛藏的殺手。
In relation to any heating equipment, any alteration of any part of such equipment or any change in the type of fuel used therein. 就加熱設備的任何部分作任何更改或改換加熱設備所用的燃料類型。
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