Is it necessary to buy a baby bottle cooler? Which brand is better? In winter, the weather is cold, and the baby may drink half of the milk. The warm milk has already become cold. In order to slow down the speed of the milk cooling, parents plan to buy a milk bottle insulation sleeve to cover the outside of the milk bottle. The milk bottle insulation sleeve has Is it necessary to buy it? If you...

The cool seal ring is one of the most commonly used materials for the manufacture of sealing elements. This popularity is due in large part to the material's excellent flexibility and working properties. Silicone seals can be made from various grades of silicone, including rubber, foam, and the ubiquitous silicone gel sealant. Solid silicone seals can be flat, gasket type, or extruded as a...

Academician Zhong Nanshan, head of the high-level expert group of the National Health Commission, said in an interview with Bai Yansong that if you are uncomfortable, you should wear a mask. Wearing a mask is still useful. In fact, you don't have to wear KN95 mask. Because these viruses do not exist alone, they often exist in droplets. General surgical masks can still block most of them, and...