thực tập cơ khí
15:11
Extreme Dangerous Fastest Big Chainsaw Cutting Tree Machines | Biggest Heavy Machinery Machines
1:55:27
Worst Fails of the Year | Try Not to Laugh 💩
29:03
【加工動画34 part1/2】旋盤用フライスアタッチメント/Milling attachment for lathes
23:51
Making a Fully Functional Jet Engine from Soda can | diy Jet Engine | homemade Jet Engine
7:37
Rèn nóng má nghiền tĩnh đĩa 203 cho xi măng Hoàng T.
56:49
A Boy Manufacturing Large Pistons in a High-Tech Factory Using Precision Techniques and Technology
16:40
Colha milhões de toneladas de bambu para processar em pauzinhos, papel, casas – Processo de bambu...
26:12