Pressure relief structure of air return crossheading von FU TENG, LIU TONGXUE, MA TAO, ZHEN CHUANGJIA, LI YONG, MA BIN, MA LONGJU, LI SHANGKUN, ZHAO LIXIN, LIU JIERU, SHI WEI

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Remote mining pulp shooting machine von FU TENG, MA YONGZHONG, LIU TONGXUE, ZHEN CHUANGJIA, MA BIN, ZHU JUNYIN, MA LONGJU, LI SHANGKUN, LIU JIERU, SONG QI, YANG JIANRU, SHI WEI

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