DIN EN 61189-2-721:2016-03
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); German version EN 61189-2-721:2015
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