Company Description: (1) plastic-steel door has never Huoxing, not spontaneous combustion, non-combustion can be self-extinguishing; (2) thermal conductivity than wood, metal is much lower; insulation effect is much better than aluminum. (3) between -30 ℃ to -70 ℃, the hot sun, heavy rain, dry, wet environment, no distortion, no color, not brittle China, but also acid and alkali substances and emissions of salt corrosion, but also from dust, cement, glue effects. (4), accompanied by well-designed d |