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GB/T 17023-1997
半导体器件 集成电路 第2部分:数字集成电路 第二篇 HCMOS数字集成电路54/74HC、54/74HCT、54/74HCU系列族规范
Semiconductor devices--Integrated circuits--Part 2:Digital integrated circuits--Section two--Family specification for HCMOS digital integrated circuits series 54/74HC,54/74HCT,54/74HCU
GB/T 17178.1-1997
信息技术 开放系统互连 一致性测试方法和框架 第1部分:基本概念
Information technology--Open systems interconnection--Conformance testing methodology and framework--Part 1:General concepts
GB/T 5078-1985
Method for the determination of the space required by capacitors and resistors with unidirectional terminations
GB/T 223.74-1997
Methods for chemical analysis of iron,steel and alloy--The combustion gravimetric/gas-volumetric method for the determination of non-combined carbon content
GB/T 7469-1987
水质 总汞的测定 高锰酸钾-过硫酸钾消解法 双硫腙分光光度法
Water quality--Determination of the total mercury--Potassium permanganate-pootassium peralfate descomposed method--Dithizone spectrophotometric method
GB/T 7589-1987
Code of Chinese ideograms set forinformation interchange--The 2nd supplementary set
GB/T 7468-1987
Water quality--Determination oftotal mercury--Cold atomic absorption spectrophometry
GB/T 3485-1998
Technical guides for evaluating the rationality of electricity usage in industrial enterprise