Paris, Davaz Town, Tractor Factory.
Dejoka was flipping through the drawings sent by Shire in his office.
It seemed to be an improvement in drilling technology.
Dejoka recently happened to have some knowledge of it because it related to the business of the Romanian Petroleum Company.
However, Dejoka didn't know much; he only knew that the first breakthrough in drilling technology was Fowell's invention of the artificial flushing device, which could pressurize and water directly through the drilling tool, then flush the crushed rock and mud from the surface through the drainage channel.
(Note: Fowell was a French engineer who obtained a patent for the artificial flushing device at the end of 1844.)
The second breakthrough was the American rotary drill technology, a drilling method with a chisel or drill bit mounted at the end, driven by a steam engine to rotate, much more efficient than an impact drill.
(Note: The American rotary drill technology was patented around 1880.)
