Observation Tower

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1. Observation tower

1 . 1 : Front

1 . 2 : Back

1 . 3 : Left

1 . 4 : Right

1 . 5 : Top

1 . 6 : Bottom

1 . 7 : Perspective

1 . 8 : Changing state view

1 . 9 : Changing state view

Figs. 1 . 8 and 1 . 9 are the first changing state view and the second changing state view of fig. 1 . 7 ; the elevator cabin in figs. 1 . 7 , 1 . 8 , and 1 . 9 are located at different heights, respectively; the elevator cabin, lift passage, water tank, fence of the upper circular platform, bottoms and fences of two protruding platforms are transparent.