The juncture of the internal and external section marbles in the marble is positioned outside the rotating plane, and the marble is withstood by marbles in other directions.
该弹子的内外段弹子交界处位于转动面以外，该弹子被其他方向的弹子顶住。
A juncture of the internal and external section marbles in the marble is positioned within a rotating plane.
该弹子的内外段弹子交界处位于转动面以内。
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