The water-reducing agent should be used with concrete admixture, which will reflect the water-reducing effect. Cement quality is therefore a direct factor of the actual effect of water-reducing agent. When dealing with different "problem" types of ce…
It is reported that the Russian New Crown Virus Epidemic Prevention and Control Headquarters released a message on the 25th that based on the principle of reciprocity, Russia will resume international flights with Germany, Venezuela, Syria, Tajikista…
SLS Nylon Powder PrintingNylon sintering (selective laser sintering) is a project that uses spread powder sticks to tile a thick layer of powder materials, such as 3D printed metal powders, on parts. It is heated below the powder melting temperature…
How serious are fertility problems today? People don't want to give birth,can't afford it, and can't give birth that has become the "three mountains". The problem of childbirth is related to the people's livelihood. Whether a country can prosper or n…