1–6 of 6 hits
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    Installation and construction method of grinding rollers of raw material grinding mill

    Free access
    WANG DONGPING / QI JI / WANG YUQI | European Patent Office | 2020

    Arched net rack hoisting construction method

    Free access
    QI JI / WANG DONGPING / YANG QINGJIANG et al. | European Patent Office | 2020

    Layering and sectioning installation method for large-span spherical-crown-shaped net rack structure

    Free access
    BI YAKUI / QI JI / WANG DONGPING et al. | European Patent Office | 2020

    Segmented hoisting construction method for large-span spherical crown-shaped net rack structure

    Free access
    BI YAKUI / QI JI / WANG DONGPING et al. | European Patent Office | 2020

    Roof tile hoisting anti-slipping device

    Free access
    QI JI / SHU ZHENLI / LIU LIHUA et al. | European Patent Office | 2020