Screw rod water leakage preventing structure of field hoist von BAI QINGZHI, WANG MINGDONG, ZUO KUIMENG, MA TIANJIANG, CHANG GUOXING, XING SONGSHENG, WU CHUCHANG, MA XIDONG, WU WEIXING, LI SUMEI, WANG RUI, SHANG SANLIN, LI HONGSHENG

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Channel top-sealing formation sliding die von ZHOU WANYIN, BAI QINGZHI, ZUO KUIMENG, CHANG GUOXING, MA XIDONG, YIN HUANQING, JU LONGCHANG, LI SUMEI, WANG RUI, PAN SHAOCHUN, LU LINFANG, ZHANG XILIN, WANG ZHONGBIN, LI ZHONGSHENG, LI JIGANG

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Highway base course solidifying agent and method for solidifying highway base course by using same von WU XIAODONG, ZHANG ZHAOSHU, ZUO KUIMENG, ZHAO ZHENDONG, ZHANG RUNNAN, CHANG GUOXING, WANG YONGQIANG, ZHU LI, ZHAO GUANGMING, YUN DEYI, LU HUAN, WANG SHUMEI, QIN BAOMEI, WEI XINGEN, LI AIMIN, FAN JIE, ZHANG JUNRAN, ZHENG RUILING, LI XIANG, ZHANG YONGQIANG, ZHANG ZHIKE, ZHANG ZHIMIN

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