Ancient Aliens S01E01 - The Evidence (VOSTFR)
, which sits in a museum, could fly. So we have two examples from opposite sides of the planet, and both examples are aerodynamically sound and ...
트리즈_TRIZ_ Part 1_Practical TRIZ
. We can easily understand from following picture.There are 2 things hanging in pulley showing us technical contradiction. As an example ...