how to draw External square thread (Draughting N4)
37:43
How to project a missing view (Draughting N4)
10:57
Right-hand square screw thread
19:58
how to draw external square screw thread N2 in 2021
14:49
external right hand square thread// engineering drawing
12:09
CAM PROFILE OF A CAM WITH A ROLLER FOLLOWER - MECHANICAL DRAUGHTING N4
1:06:51
epicycle gears (mechanotechnics N4)
24:53
how to draw displacement diagram (Draughting N4)
23:48