名词
中文翻译：Unknown
同义词：
['arc pole', 'cathode arc']
例句：
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1.The arc cathode is the key to the operation of the welding machine.
弧极是焊接机操作的关键。
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2.In the arc cathode, electrons are accelerated towards the anode.
在弧极，电子被加速向阳极移动。
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3.The arc cathode is responsible for creating the intense heat and light in the welding process.
弧极负责在焊接过程中产生强烈的热和光。