如图所示是固体焊接机的工作剖面图.不旋转的铝件在强大压力作用下顶住高速旋转的铜件通过 的方式改变物体的内能.工件的内能变 .——青夏教育精英 Template




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tomski如图所示是固体焊接机的工作剖面图.不旋转的铝件在强大压力作用下顶住高速旋转的铜件通过 的方式改变物体的内能.工件的内能变 .——青夏教育精英 coloring