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GB/T 28864.1-2012
Terms and nomenclature for cores made of magnetically soft ferrites - Part 1: Terms used for physical irregularities
GB/T 28867-2012
含碱性或其它非酸性电解质的蓄电池和蓄电池组 方形密封镉镍单体蓄电池
Secondary cells and batteries containing alkaline or other non-acid electrolytes - Sealed nickel-cadmium prismatic rechargeable single cells
GB/T 28278.2-2012
滑动轴承 稳态条件下不带回油槽流体静压径向滑动轴承 第2部分:不带回油槽油润滑径向滑动轴承计算的特性值
Plain bearings - Hydrostatic plain journal bearings without drainage grooves under steady-state conditions - Part 2: Characteristic values for calculation of oil-lubricated plain journal bearings without drainage grooves





