• 1. Face apex: 顶锥顶
• 2. face apex beyond crossing point: 顶锥顶至相错点距离 | 顶锥顶至相错点间隔
• 3. The North Face Apex Elixir: 超轻户外冲锋衣

更多释义

• 1.Finally, the coal-rock mass in the arch angle and apex is slided, and causes the distortion of local rock pressure, even induces dynamic hazards around working face.
  拱角与拱顶煤岩滑落失稳，造成工作面局部压力畸变并诱发动力学灾害。
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