- 重合: coincide; coincidence; reclo ...
- 角: role; part; character
- 重合: coincide; coincidence; reclosing; registration (图像); superposition; match together 这两个三角形相重合。 the two triangles coincide
- 抱合角: looping angle; wrapping angle
- 闭合角: angle of attachment; dwell angle
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