C635 Support Mineral Development Infrastructure

The last time Wai Quan had seen the Tesla Coil, he had a blank expression on his face, which made Qin Feng realize the importance of theory and science.

These craftsmen naturally had no problem with their craftsmanship. No matter how exquisite the parts were, as long as they were given enough time, they would be able to complete them.

However, these were all things that could be seen