Deep researches have achieved on small deep hole machining on Titanic alloy with EDM.

对钛合金深小孔的电火花加工工艺进行了深入的研究。

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This paper introduces the technology of broaching accurate, small deep hole and the design of broaching tool as well as its parameter's selection.

介绍用拉削加工精密小深孔的工艺方法及拉刀的设计、 参数的选择。

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The utility model belongs to the field of metal material cutting tools, especially fitting for boring processing of a small deep hole of brittle rare and precious metal material.

本实用新型属于金属材料的切削刀具领域，特别适合于脆性稀贵金属材料的小深孔套料加工。

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"The moment you start talking about such massive debts people stop being so careful... they realise they're in a deep hole and small amounts of effort won't dig them out again, " he said.

BBC: Average UK student debts 'could hit ?53,000'