core-drilling exploration
常见例句
- Hydro-hammers provide high penetration rate in hard rocks, less borehole deviation, and high core recovery in exploration drilling. The technology has been established and its uses are being extended.
液动锤在钻探施工中具有能提高硬岩钻进速度、减小孔斜和提高岩心采取率等优点，技术成熟，应用领域正在拓宽。
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