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Dive into the research topics where Zhao Junfeng is active.

Publication


Featured researches published by Zhao Junfeng.


Archive | 2013

Sleeve-pipe clamp and sleeve-pipe downing device

Fang Youxiang; Sha Fu; Tong Bi; Zhao Junfeng; Hu Shechang; Cheng Heyu; Shi Dezhou; Gao Ling; Zhang Shikuo; Liu Degui


Archive | 2015

Compressing-deslagging-drilling dust remover for coal pits

Wang Zhuliang; Sheng Huaxing; Cui Xing An; Zhao Junfeng; Cheng Heyu; Ding Yanqin; Zhang Jianxin


Archive | 2014

Grouting hole packer with capsular bag

Du Lei; Zhao Junfeng; Tong Bi; Li Shaobing; Zhu Ya; Fang Youxiang; Feng Shouxiang; Ding Dawei; Chen Mingkun; Wang Fengrong; Zhu Mingming; He Luxu


Archive | 2013

Drill bit and drilling device

Tong Bi; Fang Liangcai; Zhao Junfeng; Fang Youxiang; Sun Xinsheng; Zhang Chuijin; Liu Degui; Huang Jiyin; Hou Hong; Shi Dezhou


Archive | 2011

Flow guide pipe for gas drainage and gas acquisition device

Cheng Heyu; Zhao Junfeng; Chen Gongsheng; Li Hailiang; Cheng Zhizhong; Ding Tongfu; Li Youjun


Archive | 2015

Drilling centering device and drilling tool

Yue Tao; Zhao Junfeng; Wang Fengrong; Ding Yun


Archive | 2014

Device for lowering sleeve in drilled hole during gas extraction

Li Changbao; Tong Bi; Zhao Junfeng; Su Lijun; Cheng Heyu; Liu Taojie; Shi Dezhou; Wang Fengrong; Sha Fu; Zhang Tianzheng


Archive | 2014

Gas drainage borehole and construction method thereof

Cheng Zhizhong; Zhao Junfeng; Chen Gongsheng; Ding Tongfu; Wang Jinye; Wang Fengrong; Zhou Yongyin; Li Youjun; Jia Shaoping; Chen Xiaolei


Archive | 2013

Downhole core drilling machine

Zhao Junfeng; Zhang Chuijin; Cheng Heyu; Gao Ling; Xu Tao; Zhang Xiang; Chen Yonghong


Archive | 2013

Sleeve holder and lower sleeve device

Fang Youxiang; Sha Fu; Tong Bi; Zhao Junfeng; Hu Shechang; Cheng Heyu; Shi Dezhou; Gao Ling; Zhang Shikuo; Liu Degui

Collaboration


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