常见例句Keywords deep-hole drillrig;deep-hole step blasting;filling passes; 深孔鑽車;深孔分段爆破;充填井;Keywords drillrig;wear parts;ferro spectrum analysis;replacement interval;grey prediction; 鑽機;易磨損件;鉄譜分析;更換時間間隔;灰色預測; 返回 drillrig