前后弧焊 tandem arc weld ; tandem welding
前冲弧圈球 accelerated loop ; fast loop drive
弧前 [海洋] fore-arc
弧前盆地 [海洋] fore-arc basin ; forearc basin
前缘弧区 frontal arc terrane
岛弧前缘 arc front
颈前低位弧形切口 Low cervical collar curved incision
前冲弧圈 speed drive ; loop drive
弧前区 forearc area
弧后陆前盆地 retro arc foreland basin
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.
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.
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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