Enroscou as porcas em duas direções.
13:26
Гайка с резьбой в два направления десять заходов.
14:04
Cómo cortar roscas cónicas
34:19
¡Colgado de un solo hilo!
19:57
Making a Solenoid Boxer 4 Engine
14:29
Perforadora de centro óptico: proyecto de construcción en un día
12:29
I made a bolt with MAZE threads - Don't strip these threads! - Can you solve the puzzle?
15:42
Making hydraulic pipe and profile bending machine
31:10