Air Permeability Tester, Oxygen Permeability Tester, Leak Tester manufacturer / supplier in China, offering Film Auto Gas Permeability Equal Pressure and Differential Pressure Testing Methods Instrument Gtr-V3, Analyzer for Film Gas Transmission Rate with Equal Pressure Method ASTM D1434 Air Permeability Tester Gtr-V3, Cap Torque Tester for Measuring Opening and Closure Torque on Bottles, Vials and Other Containers Pny-20A and so on.