... manufacturing and other industries of do a lot impact testing. JB-300B-type impact test machine meet the national standard GB ... , the impact of knife thickness: 16mm9, angle accuracy: ± 0.1 °11, sample size: 10 × 10 × 55mm12, Dimensions: 1500 mm×850 mm ... : No corrosive media environment, no vibration, no strong electromagnetic fields. JB-300B Semi-automatic Impact Testing Machine