IEC 60483-1976 Guide to dynamic measurements of piezoelectric ceramics with high electromechanical coupling《高机电耦合压电陶瓷的动态测量指南》.pdf

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IEC TR 61241-2-2-1993 Electrical apparatus for use in the presence of combustible dust part 2 test methods section 2 method for determining the electrical resis.pdf

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