全熔透焊缝不存在包角的问题。
With a full pen weld, the question of "return" doesn't come up.
目前，国内大跨径悬索桥钢箱梁大多为全焊结构，具有结构复杂、熔透焊缝多，制造难度大等特点。
The domestic steel box beam for long-span suspension bridge is mostly welded structure at present, which features complex structure, a great deal of penetration welds, difficult manufacture.
采用合理的焊前表面处理工艺、全熔透焊接可获得无气孔的焊缝。
The weld can performed free of porosity for full penetration weld when proper surface treatment processing prior to welding is employed.
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