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GB/T 20303.5-2021 起重機(jī) 司機(jī)室和控制站第5 部分:橋式和門式起重機(jī) Cranes-Cabins and control stations- Part 5...2023-07-14

GB/T 19056-2021 汽車行駛記錄儀 Vehicle travelling data recorder2023-05-03

GB/T 20303.5-2021起重機(jī) 司機(jī)室和控制站第5 部分:橋式和門式起重機(jī)Cranes—Cabins and control stations—Part ...2022-10-25

GB/T 19056-2021汽車行駛記錄儀Vehicle travelling data recorder2022-10-26

SJ 20396-1994機(jī)載雷達(dá)用柵控行波管組合高壓電源通用規(guī)范General specification for the grid control travelling w...2022-06-09

Explicit analytical wave solutions of unsteady 1D ideal gas flow with friction and heat transfer2020-09-15

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