drawpoint

常見例句

• Blocking of drawpoint or orepass is often happened during drawing process.Traditionally, this has to be tackled by blasting, often with great difficulty and even big danger.
  漏斗溜井堵塞在井下放礦作業(yè)中經(jīng)常發(fā)生,用普通爆破法處理堵塞時,作業(yè)極為困難和危險。
• Keywords Bottom drawpoint;Velocity distribution;Influence height;Mechanism of influence;Ore drawing at stope;
  底部放礦口;速度分布;影響高度;影響機理;采場放礦;
• Keywords trench bottom structure;drawpoint effective height;drawpoint diameter;stoping and filling;
  塹溝受礦底部結構;放礦口有效高度;放礦口直徑;充填采礦法;
• Keywords Blocking of drawpoint or orepass;Cutter hood of shaped charge;Mining rocket projectile;Horizontal periscopical system;
  漏斗溜井堵塞;礦用火箭彈;聚能罩;水平潛望系統(tǒng);
• drawpoint brow
  放礦點口
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