Many adults in the village were in these villages and towns at the door of their homes and had work, and they were all from the same village, and the children were not strictly controlled in and out.

Zhang Han clearly remembers that because of curiosity, he also watched the process of producing cement in cement factories.

Kids!

It is the age when you are curious about everything, especially cement, which can become a wall and a road with water.

So Zhang Han remembers very deeply, the production method of the small cement factory at that time was; The limestone is ground finely, a certain amount of clay is added, mixed with water and stirred evenly to form a slurry, and then the mud is placed on a plate to heat, dried and then crushed and then calcined,......

"As a Han Chinese, I actually want to follow the Mongolian expedition to the west" 0326 "Five-year plan? "Big infrastructure plan?" I am hitting it in my hand, please wait a moment,

Once the content is updated, please refresh the page again to get the latest updates!