Arc Burns. Localized points of surface melting caused by arcing between electrodes or ground and pipe surface.

电弧烧伤。由于电极(含接地极)与管子表面之间起弧而产生的局部表面熔化点。

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All carbon arc gouged surface areas shall be ground to clean bright metal prior to subsequent welding.

开始后续焊接前，所有碳弧气刨面区域应接地至洁净明亮的金属。

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In the end, arc, processing and ground is large diameter conical parts, along the X axis into to, is the same, but the linear cutting speed is constantly changing, the cutting surface quality changes.

在加工端面、圆弧、圆锥以及蹊径直径相差较大的零件时，沿X轴方向进给时，固然进给速度不变，但切削线速度却不断地变化，导致加工表面质量变化。

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When asked last year about the rules of engagement for tear gas, he told the BBC that police in America are trained not to fire head-high and to either arc the canister into the air or roll it on the ground.

BBC: Bahraini dies after being struck by tear gas canister