ハイテンション引張りスプリング
14:55
The process of making giant springs. spring factory in japan
13:57
もうすぐ95歳!! 現役社長による巻き芯加工
16:40
Harvest Millions Tons Of Bamboo To Process Into Chopsticks, Paper, Houses– Bamboo Process In Factory
15:08
Watchmaking: Machining a Watch Gear
3:50
ロングコイルスプリング（スパイラル）
8:52
Process of mass-producing springs with special machines
10:53
The process of making automotive springs. Japanese Spring Manufacturing Factory.
53:35