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- Pneumatic hammer drilling technology with low wob,low rate of revolution and high capacity to break rock is one of the best effective methods to solve the problems of hard rock drilling. 空气锤钻井是一种低钻压、低转速、高冲击破岩回转钻进技术,它兼容了气体钻井和冲击回转钻井的优势,其机械钻速一般比回转钻井高,是当今解决硬岩钻井难题的一种有效方法。
- Inserted diamond bit applied to hard rock drilling in Xinji Mining Area 孕镶金刚石钻头在新集矿区坚硬岩层钻进中的应用
- Lately they have been getting into hard rock. 近来他们一直热衷于演奏硬派摇滚。
- Application of Rotary Rig in Hard Rock Drilling for Foundation Project of One Power Station 旋挖钻机在某电厂桩基工程硬岩地层中的应用
- The Application of the Hard Rock Drilling Technique with Large Diameter in Chinese Continental Scientific Drilling Engineering 大口径硬岩钻探技术在中国大陆科学钻探工程中的应用
- hard rock drilling technology 硬岩钻进技术
- Under the crust are many layers of hard rock. 在地壳的下面是许许多多坚硬的岩石层。
- Hard rock is the real cultural revolution. 摇滚是一场真正的文化大革命。
- Features: rock drilling for opencast mining and quarrying field. 适用于露天矿、采石场开采，用于高低风压潜孔钻机。
- Lately they have is get into hard rock. 近来他们一直热衷于演奏硬派摇滚。
- Lately they've been getting into hard rock. 近来他们一直热衷于演奏硬派摇滚。
- The rock drill is indispensable for digging coal mines. 凿岩机是煤炭采掘不可缺少的工具。
- Tina: What about hard rock songs? 蒂娜：那么摇滚乐歌曲呢?
- You ever heard of a hasidic jew into hard rock? |你听说过哈西德派犹太人从事硬摇滚吗?
- If they knew how difficult it was to drill through the hard rock, they would lose heart. 如果他们知道了钻透那坚硬的岩石有多么困难,他们会丧失信心的。
- She made herself as comfortable as the hard rock permitted. 她在坚硬的岩石上尽可能坐得舒服些。
- However, the SEP in diamond rotary drilling was higher than the SEP in percussive drilling in lightly weathered hard as well as in extremely hard rock. 在微风化的坚硬与极坚硬岩石中，金刚石旋转钻进比功则明显高于冲击凿碎比功。
- The boy has been chipping away at that hard rock for four hours. 那小伙子凿削岩石已经四个小时了。
- LHS Rock Tools CO.,LTD-Rock tools,Rock drills,Rock drilling ... 辽宁葫芦岛莲花山凿岩钎具有限公司（LHS）生产优批发、莲花山凿岩.
- In the 1970s, groups played hard rock and punk music, instead. 而到了70年代，乐队开始演奏重金属和朋克音乐。
