The Introduction of white cement
It is a white hydraulic cementing material made by grinding, called white silicate cement (referred to as white cement).…
It is a white hydraulic cementing material made by grinding, called white silicate cement (referred to as white cement).…
The European Commission has submitted to member states a new draft of sanctions against Russia, including an oil embargo. Some member states that rely heavily on Russian energy sought exemptions. Western media reported that the European Commission d…
GaN is a semiconductor material of third-generation with a wide forbidden-band width and better characteristics than the GaAs or Si materials of first-generation. GaN devices, due to their high thermal conductivity and large band gaps, can operate a…
A recent poll in Britain found that public support for sanctions against Russia is falling as fuel and prices rise. The proportion of people willing to accept higher fuel prices as a result of western sanctions against Russia fell 14 percentage poin…