短语词组短语knee bolter [木]圆锯机Vulcan Bolter 火神抛洒者roof bolter 锚杆机bolter flanges 螺栓接合缘bolter r 筛选机;锚栓冲击机rock bolter 锚杆冲击机universal bolter 通用筛bond bolter 除节机Johannes Bolter 鲍尔特 返回 bolter