The machine skeleton uses the steel plate overall welding structure, firm is durable.
机器构架采用钢板整体焊接结构，坚固耐用。
The type B120 metro vehicle aluminum car body is overall load bearing structure, which is mainly made from large aluminum extrusions connected by welding.
B120型地铁铝合金车体为整体承载全焊接结构，主要采用大型中空铝合金型材组焊而成。
Therefore, it is necessary to forecast and control the overall structure of the welding deformation.
因此，预测并控制整个结构的焊接变形量是有必要的。
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