arc of fire
... 接触弧 arc of contact 火焰弧 arc of fire 渐远弧 arc of recess ...
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电弧火焰加热器 arc flame heater
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至于为什么等离子不用电容调高，火焰不用弧压调高？
As for why plasma don't raise, flame don't capacitance arc by high pressure?
youdao
而弧压调高要依赖电弧，火焰切割是不出现电弧的。
The high pressure and arc will rely on the arc, flame cutting is not appear the arc.
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