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Aineistot 2558-2560 / 2560

    • "Året präglades av coronaviruspandemin" – Regeringar rapporterar om statligt ägda bolag i Finland och Sverige 

      Koskela, Merja; Enell-Nilsson, Mona; Katajamäki, Heli; Enell-Nilsson, Mona; Kauppinen-Räisänen, Hannele; Limatius, Hanna (VAKKI ry, 15.12.2022)
      article
      The governments of Finland and Sweden report annually on state-owned companies. The reporting aims to motivate and legitimize state ownership and thus constitutes an example of sustainable public communication. In this ...
    • 双钻头自平衡钻进系统用多通道连续缆管设计 

      Zhao, Yan; Ai, Hongxin; Gao, Ke; Zhang, Congshan; Lyu, Xiaoshu; Xie, Xiaobo (China Coal Research Institute, 04 / 2023)
      article
      The problems, such as low drilling efficiency, large disturbance to the hole wall and long assistance time of tripping caused by the “long arm jurisdiction” drive of the ground drilling rig to the underground drill bit, ...
    • 钻孔救援连续缆管储放设备研制 

      Gao, Ke; Niu, Xin; Zhao, Yan; Qin, Xiaolin; Lyu, Xiaoshu; Xie, Xiaobo (China Coal Research Institute, 03 / 2023)
      article
      The double-bit bionic self-balancing continuous drilling technology has the advantages including requiring no drilling rig, high drilling speed and slight disturbance to the borehole wall. It is one of the key potential ...