Prefabricated pipe pile spiral slag pulling-out device von PI CAN, CHEN ZHENDONG, JIANG MANZHENG, HE YUTING, LIANG QINGXIANG, HUO JIEHUA, TANG WUXING, QIU HAODONG, LIN LUHAI, SUN NAIQIANG, ZHENG RUBIAO, CHEN HUANQING

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Reusable safe edge protection bracket von LIU BIN, XU GUOLIANG, LIU RUYI, WANG TAO, WANG JUN, ZHANG HONG, CAO MANZHENG, SHANG JIANMING, BAO YAKUN, JIANG WEIXIAN, ZHANG WEI, WANG RUIPING

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