• The deep well coal road cable of small diameter hole and high pre-tension structure and craft were studied according to the condition of high stress and composite roof in Fengcheng coal field.

    结合丰城矿区地应力顶板等复杂地质条件研究深井条件下煤巷锚索采用孔径、加高预应力的结构形式施工工艺

    cn.bab.la

  • The platform was under the control of an Israeli Air Force ground controller, who is believed to have lost contact with the UAV after which it lost altitude and hit a high-tension cable.

    平台以色列空军地面控制器控制之下已经无人机失去联系失去高度撞上一个高压线。

    www.globalmil.com

  • The platform was under the control of an Israeli Air Force ground controller, who is believed to have lost contact with the UAV after which it lost altitude and hit a high-tension cable.

    平台以色列空军地面控制器控制之下已经无人机失去联系失去高度撞上一个高压线。

    www.globalmil.com

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