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GB/T 34497-2017 端子連接器用銅及銅合金帶箔材 Copper and copper alloy strip and foil for terminals and connec...2023-07-16

GB/T 13997-19992048kbit/s、8448kbit/s、34368kbit/s、139264kbit/s光端機(jī)技術(shù)要求Technical requirement for 2 04...2022-06-14

YD/T 1016-1999接人網(wǎng)用PDH光端機(jī)技術(shù)條件Technical condition for PDH optical line terminals used in access net...2022-06-12

GB/T 18978.2-2004使用視覺顯示終端(VDTs)辦公的人類工效學(xué)要求第2部分;任務(wù)要求指南Ergonomic requirements for ...2022-06-10

Performance analysis on channel capacity in cooperative MIMO system2020-12-06