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GB 30439.1-2013
Safety requirements for industrial automation products—Part 1: General requirements
GB 30439.2-2013
工业自动化产品安全要求 第2部分: 压力/差压变送器的安全要求
Safety requirements for industrial automation products—Part 2: Safety requirements for pressure (differential)transmitter
GB/T 30492-2014
Natural gas-Gas chromatographic requirements for hydrocarbon dewpoint caculation
GB/T 4507-2014
Standard test method for softening point of bitumen-Ring-and-ball apparatus
GB/T 30103.2-2013
Methods of testing for thermal performance on cold store-Part 2: Air velocity testing





