... systemScrew: specially designed based on material’s trait, High quality nitriding steel 38CrMoAlA,with nitriding surface HV≥800, ... brittleness≤2;Barrel: High quality nitriding steel 38CrMoAlA,with nitriding surface HV≥900, ... safety door, safety switch protection.THREE.GRT50-2L Blow molding machine Specifications Main ParametersUnitGRT50-2LMax. Product Volume(L)2Dry Cycle ...