The central rotational circular altar of Zhonghua Century Altar is a special dynamic structure of full steel and closed spaceframe.
中华世纪坛中央旋转圆坛为全钢封闭式空间刚架的动态特种结构。
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Frame: the frame is made into a spaceframestructure, including the welded longitudinal beam and the whole pulling-through crossbeam, of which are made of 16mn vehicle steel.