Imagine an elastic band stretched over the surface of an apple. The band can slowly shrink, moving as though it is slipping from the surface, until it becomes just a dot on the apple's skin.
试想一下，有一个橡皮圈箍在苹果的表面上，然后这个橡皮圈慢慢的收缩，就像从苹果表面上滑落一般的收缩，直到它变成了一个点。
The transformation of weld forming is the results of dual functions of arc shrink and surface tension change.
焊缝成型的变化是电弧收缩与表面张力变化双重作用的结果。
It has many advantages, such as high working speed, seal impression is clear and no diffusing, seal surface will not shrink or deform.
它具有制作快捷（客户可即定即做、立等、可取）印迹清晰不扩散，印面不收缩、 不变形的特点。
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