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A surgical instrument having circular,sawlike edges,used to cut out disks of bone,usually from the skull. 環(huán)鑽一種用於切除骨片的手術(shù)工具，有圓形鋸狀刀鋒，通常用於頭蓋骨手術(shù)
A surgical instrument having circular, sawlike edges, used to cut out disks of bone, usually from the skull. 環(huán)鑽一種用於切除骨片的手術(shù)工具，有圓形鋸狀刀鋒，通常用於頭蓋骨手術(shù)
The earliest examples used sweeping wires with sawlike projections to cut the cables anchoring submarine mines and allow them to rise to the surface, where they would be destroyed by gunfire. 最早的掃雷艦使用帶有鋸齒的掃雷索切斷水雷的系泊纜，使之浮出水麪，再用砲火將其擊燬。