So, choose as far as possible to improve the nozzle of small high cutting speed and cutting quality is useful, but the nozzle at low altitude may cause double arc phenomenon.
所以，选用尽量小的喷嘴高度对提高切割速度和切割质量都是有益的，但是，喷嘴高度过低时可能会引起双弧现象。
In addition, too much cutting speed and big nozzle height can cause and the increase of the poor incision width.
另外，过大的切割速度和过大的喷嘴高度都会引起切口上下宽度差的增加。
As a result, it was found that injection speed could be increased through varying nozzle port opening width under keeping constant injection pressure.
实验结果表明，在压力恒定的条件下，可通过控制喷嘴开启量大小获得不同的注射充填速度。
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