To save time a contractor's fit for purpose burner (usually a propane burner) supplying large amounts of warm air at low temperature can be used.

为了节省时间，可采用在低温下供应大量暖空气的承包商适用的烧嘴（通常是丙烷烧嘴）。

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The way this burner system melts metal is simply by pushing the flame exit port up against the hole in the furnace which ordinarily would hold the propane burner (or air blast on a charcoal furnace).

这种燃烧器的方式系统的金属熔体的火焰推出境口岸打击在炉内的通常会举行一个木炭炉的丙烷燃烧器。

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Fossett will use a bigger balloon this time, and control its altitude by working a propane ethane burner.

CNN: Global balloon race to get off the ground tonight