Chinese assembly line
Went to one of the biggest manufacturing plants of tractors in China. The firm exports their tractors to other Asian countries. There, you will be witnessed on how small parts are pieced together until the final product is formed. And mind you, everything is done manually (the reason? probably to give job opportunities to more people).
The plant is really big, generally clean, and in order, although ventilation seemed insufficient. But, the workers looked unmindful of their work condition (maybe, they are well used to it) and had full concentration on what they were doing.