The invention pertains to medical devices, in particular to an intramedullary nail hollow drill for the treatment of tibia, femur and other human tubular bones at the fracture site.

本发明属医疗器械，具体涉及一种胫骨、股骨等人体管状骨头骨折部位治疗用的髓内钉空心钻。

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The utility model relates to an intramedullary nail hollow drill for treating tubular bone fracture, as shin bone tibia and femoral bone or the like, belonging to medical equipment.

本实用新型属医疗器械，具体涉及一种胫骨、股骨等人体管状骨头骨折部位治疗用的髓内钉空心钻。

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The riser's inner hollow core (a pipe within a pipe) is reserved for the drill string.

立管内部核心是空心的(管中管)，留给钻柱使用。

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Using a hollow tube, they drill into the tree and extract a 5-mm wide cylinder that shows each ring starting with the most recent, just under the bark.

VOA: standard.2010.04.05

Over the next five years, the team will use a long, hollow, rotating drill to cut and retrieve a cylinder of ice roughly 12 centimetres across.

ECONOMIST: The South Pole as location and metaphor

To drill the well, engineers have devised an ingenious system of hollow "riser pipes" that create a hermetic seal between the well opening on the sea floor and the ship swaying above.

FORBES: The delicate art of sucking up