cable percussion boring 钢绳冲击钻探
Percussion boring machine 冲击式钻土机
Machine percussion boring 撞击式钻探机
percussion boring injection pile 冲孔桩
percussion type boring machine [机] 冲击式钻机
percussion rotary boring 冲积钻钻探
boring by percussion 冲击钻井 ; 冲击钻进
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