Rotating head range: about 360 degree rotation, upper and lower 180 degree rotation.
灯头旋转范围：左右旋转360度，上下旋转180度。
At the top of the tower 45-degree rotation was designed, making it a static, dynamic and interesting architecture.
塔顶经45度旋转，使得这静态的建筑多了一分动感和趣味。
What is the polar shift theory? Is it true that the earth's crust does a 180-degree rotation around the core in several days if not hours?
极地转移理论是什么？地球的外壳将会在几天如果不是几小时之内的话围绕地心旋转180度的说法是真的吗？
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