自動連結器のモデルと仕組み(Automatic train coupler)
7:21
20 Mechanical Principles combined in a Useless Lego Machine
11:40
The Smart Tricks Inside Telescopic Machines
3:08
電気連結器（密着連結器）のモデル(Automatic train coupler)
12:12
Comparaison de la gravité de rotation
2:02
European Railroad Coupler
23:57
Strong Rail Action ⚙🔥💨🎬🚂
1:55:27
Worst Fails of the Year | Try Not to Laugh 💩
8:10