PS: At the end of the fifth shift, ask for a monthly ticket.
Liu Hai took out the drawing and made the engine.
However, when it comes to molds, Liu Hai decided to make them himself, and asked Li Dali to prepare the materials, and then started casting them himself.
This time, Liu Hai made a new material, boron cast iron, which contains 0.07% boron to increase wear resistance.
There are many types of wear-resistant cast iron, such as high calcium, rare earth, etc., but at this stage, boron is easier to do.
With this, the life of the cylinder liner is greatly increased, which is why the bangs have to cast their own parts so that they can get new materials. Anyway, they can make