现行 SJ 1538-1987
电真空器件用镍及镍合金化学成份 电真空器件用镍及镍合金化学成份 Compositions of Nickel and Nickel alloy for vacuum tubes
发布日期:1979-11-06
实施日期:1987-12-01
分类信息
标准简介

本标准适用于制造电真空器件用镍及镍合金材料

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化学成份真空器件

最后更新时间 2025-08-28