常见例句Keywords deep-hole drillrig;deep-hole step blasting;filling passes; 深孔钻车;深孔分段爆破;充填井;Keywords drillrig;wear parts;ferro spectrum analysis;replacement interval;grey prediction; 钻机;易磨损件;铁谱分析;更换时间间隔;灰色预测; 返回 drillrig