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GB/T 223.38-1985 Methods for chemical analysis of iron，steel and alloy--The anion-exchange separation-gravimetric method for the determination of niobium content 钢铁及合金化学分析方法 离子交换分离-重量法测定铌量 - 英文版 |
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GB/T 3489-1983 Hardmetals--Metallographic determination of porosity and uncombined carbon 硬质合金 孔隙度和非化合碳的金相测定 - 英文版 |
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GB/T 3145-1982 Benzene--Determination of crystallizing point 苯结晶点测定法 - 英文版 |
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GB/T 3142-1982 Lubricants--Determination of load-carrying capacity (four balls method) 润滑剂承载能力测定法 (四球法) - 英文版 |
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