FR4 is a composite material composed of woven fiberglass cloth with an epoxy resin binder that is flame resistant (self-extinguishing) and versatile high-pressure thermoset plastic laminate grade with good strength to weight ratios.
HYMF/SF 20/380•Air-cooling; DSP+ARM+IGBT Structure; Optimized Q value control method•7-inch LCD display with touch screen; concise and legible interface simple to use; digitized control with high control accuracy•The power output and current output contro