从中间向两端逐步退焊法变形最小，采用逐段跳焊法也可以减少变形。
Take welding from middle to both ends step by step may have the least deformation, or take welding from one section to another step by step may also reduce the deformation.
提出采用合理控制装配、焊接顺序以及多段逆向大幅度跳焊法等工艺，可有效控制油罐底板焊接时产生的波浪变形。
The authors consider that rational welding sequence and multi-plate skip welding method can effectively suppress the wave-type deformation of bottom welding.
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