multi-drill 排钻 ; 多轴钻
multi drill head 多轴钻床主轴箱
multi-land drill and reamer 多棱钻铰刀
multi diameter drill 阶梯钻头 ; 台阶钻头
two diameter multi-land drill 双直径多棱钻头
multi-boom drill 多臂钻
multi-drill small-diameter deep-layer mixing pile 多头小直径深层搅拌桩
multi-spindle gang drill 多头钻孔机
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