The result indicates that the optimal composite displacement system is to drive remaining oil by ways of oil bead deformation, stretching, and forming oil threads.
结果表明，最佳复合驱驱油体系以油珠变形、拉伸、形成油丝的方式启动剩余油。
The rear impact roller stretches the weld longitudinally with transverse compressive plastic deformation of the weld, thus reducing the residual deformation and stresses in the bead.
后轮将焊缝金属的纵、横向压缩塑性变形充分碾展，减小了工件的残余变形和应力。
The rear impact roller stretches the weld longitudinally with transverse compressive plastic deformation of the weld, thus reducing the residual deformation and stresses in the bead.
后轮将焊缝金属的纵、横向压缩塑性变形充分碾展，减小了工件的残余变形和应力。
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