OVE EN 61189-2-721:2016-04
Действует
Test methods for electrical materials, printed boards and other interconnection structures and assemblies -- Part 2-721: Test methods for materials for interconnection structures – Measurement of relative permittivity and loss tangent for copper clad laminate at microwave frequency using split post dielectric resonator (IEC 61189-2-721:2015) (english version)
