This force is not the universal gravity but electromagnetic force.
此引力并非万有引力，而是电磁力。
Electromagnetic force is uniform in circumferential and flow like vortex.
电磁力在横截面周向上分布均匀，流动呈涡旋状。
Joule heat and electromagnetic force coupling physical effect are the main mechanism of these phenomena.
焦耳热和电磁力偶合物理效应是造成这些现象的主要机理。
Tube electromagnetic forming is realized by magnetic pulse force.
管件电磁成形是依靠磁脉冲力来实现的。
Tube electromagnetic forming is realized by magnetic pulse force.
管件电磁成形是依靠磁脉冲力来实现的。
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