Brake safety device of beam-pumping unit von LI YONGLIN, DENG CUNZHENG, WANG FEI, WANG GONGFENG, SONG RUIMING

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But guide back -off -type safety hit dipper of shoes von LIANG XU, DENG CUNZHENG, ZHANG QIYONG, HUANG HUAN, HE PENG, WANG YU, WANG BIN

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Foundation pit support system and foundation pit support method von ZHAN HONGXUE, SU XING, LI XIANGSHANG, ZHANG YUNPING, LI JIAZE, JIANG CHENXI, GE SHAOYU, NIU XUETAO, HUANG DONGMING, LIN XIAOXIA, DENG XINQI, SUN JIAYUN, CHE XIAOGANG, LI LIN, ZENG JIANHUI, WANG QINGCHENG, YANG TAO, JANG HYUN, ZHANG JIAQI, TANG JIUXI, DENG XIAOGUO, JI CUNZHENG

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Foundation pit supporting system and foundation pit supporting method von ZHAN HONGXUE, YU DANNI, LI XIANGSHANG, ZHU JUNSHU, ZOU HAIFENG, JIANG CHENXI, YA ZHENGDA, GE SHAOYU, ZHANG YONGFENG, NIU XUETAO, ZHOU YINGJIE, CHE XIAOGANG, LI LIN, WANG QINGCHENG, ZENG JIANHUI, YANG TAO, JANG HYUN, ZHANG JIAQI, TAN XUQI, DENG XIAOGUO, QIU ZHICONG, LIU TAO, JI CUNZHENG

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