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    Protective device for maintenance of subway platform door

    Freier Zugriff
    ZHANG QIAN / GONG QIAOLI / LI ZENGFENG et al. | Europäisches Patentamt | 2024

    Rail-mounted area manpower transport vehicle for metro vehicle maintenance

    Freier Zugriff
    ZHAO XINYU / CHANG MIAO / LI ZENGFENG et al. | Europäisches Patentamt | 2024

    Automatic anchoring device of crane and using method thereof

    Freier Zugriff
    MAO CONG / HE ZEYU / ZHANG WEIYOU et al. | Europäisches Patentamt | 2023

    Hoisting construction method of reinforcement cage

    Freier Zugriff
    SONG PENGJIE / ZHANG ZHENGXU / ZHANG YONG et al. | Europäisches Patentamt | 2023

    Device for releasing pressure of jack and jack system

    Freier Zugriff
    CHEN WENSHENG / LIU CHUANZHI / ZHANG HONGXIN et al. | Europäisches Patentamt | 2021