... box 3150A 2. Casting resin material 3. 3150A 1. Adopts epoxy resin automatic pressure gel craft that be APG craft ... Machine, Electrical performance fit. 2. Adopts high toughness epoxy resin manufacture, Machine capability excellent. And adopts low reaction activity ... 3.Adds activated silica slight powder, Furthurs enhance epoxy resin's machine capability, Much ensures insulate longterm keep good ...