41:24

Have you seen this kind of giant piston before?

33:32

Unbelievable Recycling ! How Old Waste Tyres Are Turned Into Oil Fuel & Steel Wires in Factory

27:04

Perfect Method! “24K Pure Gold Extraction from Million Old Smartphones — Inside the Factory Process

17:09

Largest Leather Factory in Pakistan | Largest Leather Manufacturer in the World - @Skills Creation

29:33

German Cars built in CHINA - FULL Production Process (how a car is made from scratch)