1. Steady unicycle wheelbarrow.
Quite often it happens that "the new is well forgotten old." This happened, for example, with many "European" inventions that have been used for centuries in China, Korea, or even in ancient Egypt ...
Since the 70s, one Swedish company produces convenient device for fixing products of complex shape during their drilling, grinding, milling, which was also invented in China, is also used for a long time by handicraftsmen to this day ...
3. Handwheel Drill.
Chinese bone and stone carvers have always been famous for their openwork products, which required many holes to be drilled in them. How did they manage to avoid the appearance of numerous chips in fragile materials such as stone and bone? Try, for example, drilling with an ordinary hand drill ...
Another "secret" of Chinese masters relates to the construction of "solar collectors" (water heaters). In fact, similar constructions in Europe (then they were called “glass boxes”, since they were made like aquariums with multi-layer glazing) have been developed since the 18th century, and one of their inventors was ...