IEC 60041-1991 Field acceptance tests to determine the hydraulic performance of hydraulic turbines storage pumps and pump-turbines《测定水轮机、蓄能泵和水泵-水轮机水力性能的现场验收试验》.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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