The gas burner may include an optional flame tube with an optional exhaust port in which a flame is contained and sequestered from diffusing air.

气体燃烧器可以包括可选的火焰管，该火焰管有可选的排出口，火焰包含于该火焰管中，并与扩散空气隔开。

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Principal requirements for flame plume length in end port glass-melting furnace were set forth.

提出了对马蹄焰池窑内最佳火焰长度的要求。

youdao

If you'd like an extra shot of flavor, flame the fruit with port, kirsch, dark rum or amaretto.

NPR: Holiday Sweets: On the Road (and in the Mail)