Earth-rock water replenishing mechanism von WANG MINHAO, LIU HONGQUAN, FENG QIANG, ZHANG FAHONG, CHUAI CHAOHUI

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Water conservancy construction drainage device capable of being automatically cleaned von LIU FENGLIANG, ZHAO GUANGYU, ZHANG QIANG, ZHENG CHAOXIAN, CHU XUEQIN, ZHENG SHUTAO, GUO CHANGMING, ZHAO WEN, JU SHUYA, ZONG HUI, MENG TING, ZHAO DELONG, CHUAI CHAOHUI, CHENG QIANG

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Socket type preset convenient electrical pipe von BAI RUIXIA, YANG ZHENYU, HU ZHIGUANG, JING MINGJIE, MA YAJUN, ZHANG TIANGUO, HUO ZHIQIANG, WANG CHAOHUI, ZHANG WENCHAO, LI CHANG, LIU XINGYU, XU XINCHENG, ZHANG YAO, ZHOU JIANTING, CHUAI LIJIE, XI RUIXIN, ZUO CHENGLAN, FENG YUXIANG, BAO CHUN, SONG YIJUN

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