What is the name of the gap between the two buildings?

Chopping Dreadwind, also called chopping Dreadwind, is a geomantic term of the Han nationality. The two buildings are so close together that the gap between them is quite narrow. From a distance, the building seems to be broken by a sharp axe falling from the sky. If it is split in half, it is the sky.

There is a term called "narrow tube effect". This phenomenon can be explained by science. Due to the narrow tube effect formed between two tall buildings, the original three-level wind can be raised to eight-level wind. There is a real case in Manhattan, USA. A lady was blown down by the wind when she passed through an area facing the sky, and the architect paid a huge fee for it.

note:

1, and the gap between the two floors is less than the total height of the two floors above 1/8. For example, Building A is 50m, Building B is 50m, and the total height of two floors is100m,100m×1/8 =12.5m, and the difference is more than12.5m, which is not considered a goddam.

2. The distance facing two floors should be calculated as 0.7 times the height of two floors. For example, building A is 50 meters, building B is 50 meters, and the total height of two floors is 100 meters. If the property is within 70 meters, it belongs to the sky.

3. A few days before and after stamping.