In the past, the material returning devices we used on the punching machines were generally dedicated to the special model, and some of the structures were complicated and the volume was large. To this end, I made a simple material return device, which is described as follows: 1. Structure pri.......

White LED driver market is hot, chip suppliers are fiercely competitive, they have to develop advanced charge pump products in which to figure a place. This charge pump can provide higher backlight power to meet the larger and more complex portable / wireless device color display needs. In addi.......

1 limestone contains 95% to 98% calcium carbonate. Limestone is ground through a 1.5 mm screen to form a limestone powder. Large amounts of application do not cause excessive soil alkalinity. 2 Gypsum contains more than 80% calcium sulfate. The agricultural gypsum is made of gypsum ore cru.......

Centrifugal pump and piping system through the characteristic curve diagram of the centrifugal pump flow control of several major ways: the outlet valve regulation, pump speed regulation and pump series, parallel regulation. The energy consumption loss of the outlet valve and the pump speed reg.......