Bracket: it gets two pivots to contact upper support plate, mid-support plate and lower support plate and fix the distance 25mm.
支架：有两根枢轴联结上承板、中承板和下承板之间的距离籍支承套固定为25毫米。
Bracket: it gets two pivots to contact upper support plate, mid-support plate and lower support plate and fix the distance 25mm.
支架：有两根枢轴联结上承板、中承板和下承板之间的距离籍支承套固定为25毫米。
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