When installing doors and windows, how should the gaps between the opening and the window frame be dealt with? The door and window measuring tape and final production size will be 1-2cm smaller than the window to facilitate later installation and avo…
The market expectation is that the building curtain wall will be the result of the building technology. It is an integration of the building technology and architectural art. Due to their outstanding resistance to fading corrosion UV, cracking weathe…
What is Alumina? Alumina. Chemical formula Al2O3. The ionic crystals are used to manufacture refractory materials. They have a melting and boiling point at high temperatures of 2054 deg C. Diaspore and bauxite are used as raw materials to make ind…
Poly propylene glycol is divided into various types according to different molecular weight, soluble in toluene, ethanol, trichloroethylene and other organic solvents. About Poly propylene glycol: PnB Poly propylene glycol is a non-ionic surfacta…
Recently, covid 19 outbreak spreads in Shanghai, China. There are more than 25,000 new asymptomatic domestic infections every day. China is implementing a dynamic zero-out policy. A leading respiratory expert said the key to COVID-19 prevention and c…