blast hole drill 凿岩机 ; 爆破孔钻机
blast hole testing drill 牙轮钻头试验钻机
blast t hole testing drill 牙轮钻头试验钻机
The optimum design method and basic principles of main reducer of rotary blast hole drill are discussed, The main reducer is taken as a whole and is optimized by discrete Complex method.
论述了牙轮钻机主机构减速器的优化设计方法和基本原理，以主机构减速器作为整体进行优化，采用离散复合形算法。
May operate air-track, rotary, down-the-hole or other drilling machines to drill blast holes or may direct drilling of blast holes.
操作空气运作轨道，旋转，向下钻孔机或其他钻探机钻爆破洞或直接钻爆破洞。
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