... spray,nickel spring, Bakelite(fiberglass),aluminum alloy polishing.Plug for electric plug:It apply high strength alloy shell and is produced ... can resist high voltage and heat,soft. 25A fluoroelastomer plug, High temperature resistance,high voltage resistance,acid,alkali,smash ... the condition of below 300 °C Technique:High temperature plug is combined by copper core interface and ceramic,and made ...