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    Unloading system and pump type retarder

    Freier Zugriff
    WANG TONG / YIN YAO / ZHANG HONGGUANG et al. | Europäisches Patentamt | 2022

    Large unmanned serving trolley based on composite power supply

    Freier Zugriff
    REN JING / ZHANG HONGGUANG / XU YONGHONG et al. | Europäisches Patentamt | 2022

    Four-wheel-drive-wheel tractor

    Freier Zugriff
    YU JIANSHUAI / ZHAO HU / ZHANG HONGGUANG et al. | Europäisches Patentamt | 2023

    early warning method, device and system for cooling system

    Freier Zugriff
    LIU YONG / ZHAN YANHAO / TANG LIZHE et al. | Europäisches Patentamt | 2021