The Hall of Imperial Peace (Qin'AnDian), is the main structure in the garden and the only one on the central axis - it stands in the center of the garden, encircled by a rectangular wall.
钦安殿，是御花园中主要的建筑，它是唯一一个在中轴线上位于御花园中心的建筑，周围被矩形的城墙围着自成一体。
The position of power axis of flow is determined by main channel when runoff is small, while the change law conforms with the law of rectangular section when runoff is large.
当小流量时水流动力轴线的位置取决于主槽的位置，当大流量时水流动力轴线的变化规律接近矩形断面的情形。
The position of power axis of flow is determined by main channel when runoff is small, while the change law conforms with the law of rectangular section when runoff is large.
当小流量时水流动力轴线的位置取决于主槽的位置，当大流量时水流动力轴线的变化规律接近矩形断面的情形。
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