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2πα、2πβ粒子发射率基准操作技术规范

O.T.N. of Primary standard for surface emission rate of 2πα 2πβparticles
标准号:JJF 1343-1990
O.T.N. of Primary standard for surface emission rate of 2πα 2πβparticles
标准号:JJF 1343-1990