Chapter 669: 628 no one appreciates

"Squeak..." A heavy mask with dark lenses shielded his face as a welder kneeled on one knee, bending over a steel plate, busily working on a welding point.

The electric welding in his hand emitted dazzling light, and sparks shot out around him, illuminating a row of neatly arranged tank hull semi-finished products nearby.

This was a production base for the No. 4 tank chassis located in the Tongcheng industrial area. Next to the welder, a group of apprentices wearing sunglasses huddled close, learning how to operate electric welding and join two pieces of steel together.

In fact, the technology for the No. 4 tank wasn't exactly advanced—if one were to observe closely, they'd notice many rivets on its chassis.

Also, due to design reasons, there were many openings on the tank chassis, including maintenance ports for the tank and escape hatches at the bottom for the crew to evacuate.