test plastic film, flake armor plate coating, etc material's impact strength, standards of GB 9639, ASTM D1709, JIS K7124, The tester is used to test the 50% energy ( figure in weight) of the impact failure ,in the condition of impacting freeness with the restrictive height .It is applied in plastic film , flake and armor plate coating. It accords with the standards of GB 9639, ASTM D1709, JIS ...