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双侧壁导洞法 meaning in English

twin-side heading method

Related Words

  1. 洞
  2. 洞洞板
  3. 洞洞装
  4. 毛洞洞
  5. 双侧
  6. 双侧板式雪犁
  7. 双侧壁喷管
  8. 双侧臂
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