This is a diverse earring jewelry box, which can hold earrings, earrings and long earrings, suitable for your daily replacement and use. The earring jewelry storage box is composed of a velvet outer layer and a plush fabric inner layer, high-quality mater
Lobe pump is a positive displacement pump. The left cam is driven by the drive shaft and the right cam is mounted on the drive shaft and driven by the gear. The two cams rotate synchronously without interfering with each other. For lobe pump with motor, t
Cationic polyacrylamide (CPAM) is a linear polymer compound. Because it has a variety of active groups, it can interact with and adsorb many substances to form hydrogen bonds.