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。
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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