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DIN EN ISO 15236-2-2017 钢丝绳芯输送带第2部分：优选带型 Steel cord conveyor belts - Part 2: Preferred belt ty...2023-05-01

SJ/Z 2567-1985滑动开关系列型谱Preferred series for slide switches2022-06-15

GB/T 19925-2005液压传动隔离式充气蓄能器优先选择的液压油口Hydraulic fluid power—Gas-loaded accumulators wi...2022-06-13

GB/T 18123-2000音频、视频及视听系统视频系统Y/C连接器的应用和优选电配接值Audio,video and audiovisual system...2022-06-09

SJ/Z 863-1980振动、碰撞、冲击、恒加速度试验设备系列型谱Preferred spectrum of values for vibration,shock and ...2022-06-06

Exploration of Water Resource and Multiple Model for Water Resource Development in Karst Areas with 2020-07-08