According to the standard (No limited): GJB638A Hydraulic systems, aircraft, types I, II, design, installation requirements; GJB450 General requirement for material reliability program; GJB1772 General specification of test stand for aircraft hydraulic systems and components; GJB1309 The requirements of metrological guarantee and supervision for large combination test of military products; GJB1452 Quality management requirements of large scale test. The above standards are according to the latest version.