南海地区新生代沉积盆地有四类：张裂盆地、走滑拉张盆地、前陆盆地和前弧盆地。

There have four kind of basins in the South China Sea area: rifting basin, strike-slip rifting basin, fore-land basin and fore-arc basin.

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沉积物被从两侧的弧前脊和岛弧冲到盆地，使该处地壳承重增加，形成洼地。

Sediments washed into the basin from both the fore-arc ridge and island arc weigh down the crust in this area, creating the depression.

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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。

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

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