The edge extension seriously affects the quality of welding. It is now to adopt down hill forming to reduce the edge extension.
边缘延伸严重影响焊接质量，目前可采用下山成型来减小边缘延伸。
Transitions: the weight shifts from down hill ski to the new downhill ski using lead change with out up weighting and down weighting.
转换：利用引导变换将重心从山下板转移到新的山下板上，没有重心的上下移动。
Transitions: the weight shifts from down hill ski to the new downhill ski using lead change with out up weighting and down weighting.
转换：利用引导变换将重心从山下板转移到新的山下板上，没有重心的上下移动。
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