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.
结合丰城矿区高地应力、合顶板等复杂地质条件，研究深井条件下煤巷锚索采用小孔径、加高预应力的结构形式和施工工艺。
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.
平台是在以色列空军地面控制器的控制之下，据信已经与无人机失去联系后，它失去高度撞上一个高压线。
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.
平台是在以色列空军地面控制器的控制之下，据信已经与无人机失去联系后，它失去高度撞上一个高压线。
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