石油电驱动钻机
oil drilling rig electric drive system
海洋平台电驱动钻机
Keywordelectric drive of offshore platform drilling rig
电驱动钻机
electric driven oil drilling rig
electric rig
electric drive of drilling rig
柴油机发电驱动钻机
diesel electric driving rig
孔底起爆技术
Hole-bottom Blasting Technique
孔底间隔装药爆破技术
spacing charging at blast hote bottom explosion technology