A dozen yuan worth of styrofoam cost me hundreds of thousands: a self-report of a door and window factory owner
Engineering Everyone knows that styrofoam thingsMarket chaos, From a few dollars to dozens of dollarsAll, can also be doneUse,It’s hard to tell what Such foaming glue is good foaming glue. I just open…
Overview of the knowledge of polycarboxylate water-reducing agents and points worth learning
New varieties of concrete are constantly increasing, and the application of high-efficiency water-reducing admixtures has also promoted the improvement of concrete construction technology and the leap…
Chinese