To cause to slide inward or outward in overlapping sections, as the cylindrical sections of a small hand telescope do.
使…在重叠部分中向里或向外滑动，如小型手动望远镜的圆柱部分的叠缩。
To cause to slide inward or outward in overlapping sections, as the cylindrical sections of a small hand telescope do.
使…在重叠部分中向里或向外滑动，如小型手动望远镜的圆柱部分的叠缩。
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