It is the sound of workers cutting through all of the re-bar to pour the foundation for the apartment house being built next door but striking it with a small hammer, repeatedly, until it breaks.

隔壁正在兴建的公寓，一群建筑工人正在切割修建地基所用的钢筋，不过是用一把小铁锤不断地锤打，直到钢筋断裂。

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They look like chipped cobbles, and they were made simply by taking one large piece of stone and striking it with another, chipping off a few bits to make at least one sharp cutting edge.

它们外表看来就像一颗颗稍稍锤击过的鹅卵石，而且它们制作简单，通常就是拿两颗石头互相锤击，至少把一端锤打出一个尖锐的边缘出来。

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This paper analyses the usage of LGK series of air plasma arc cutting machine, and enumerates the causes and solutions of striking arc, main circuit, gas path and cutting torch breakdown.

分析了LGK系列空气等离子弧切割机的使用方法，例举了其引弧故障、主电路故障、气路故障、割枪故障产生的原因和解决方法。

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