On the basis of this, the problems existing in the study of water-jet rock breaking theory are reviewed out and analysed and some su…
在此基础上评述和分析了水射流破岩理论研究存在的问题，并为水射流破岩理论的研究提出了一些建议。
On the basis of this, the problems existing in the study of water-jet rock breaking theory are reviewed out and analysed and some Suggestions for the theory study are given.
在此基础上评述和分析了水射流破岩理论研究存在的问题，并为水射流破岩理论的研究提出了一些建议。
ROCK concerts, iPods, jet engines, motorcycles, snowmobiles, infections and trauma - our ears are under siege.
摇滚乐、随身听、喷气发动机、摩托车、摩托雪橇、传染病，还有外伤——我们的耳朵总是遭到围攻。
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