The clamping claw with high hardness, and intermittent cutting, so that when the cutting depth and cutting amount is small, the cutting speed is not too high.
因卡爪硬度较高，又系断续切削，所以修正时切削深度和走刀量要小，切削速度也不宜太高。
The too small gas flow makes plasma arc lost due to the degree and straight cutting depth becomes shallow, but also easy to produce hang slag;
过小的气体流量则使等离子弧失去应有的挺直度而使切割的深度变浅，同时也容易产生挂渣；
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