Our usual heat sources, gas flames and glowing coals and electrical elements, have temperatures well above 1,000 degrees Fahrenheit.
我们通常使用的热源，像天然气的火苗，燃烧的煤或者某种电器，温度都会超过华氏1,000度。
DANGER: Never heat an aluminum cylinder with electrical resistance elements.
危险：禁止用电阻元件加热铝瓶。
DANGER: Never heat an aluminum cylinder with electrical resistance elements.
危险：禁止用电阻元件加热铝瓶。
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