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N a groove or fluting, esp one around the cylindrical part of a bullet (尤指子弹壳的)槽线
According to the invention, the needle has a cannelure (14), for holding a supporting element (19) with a form of strip (20).
根据本发明,该针具有套管(14),用于保持具有条带(20)形式的支撑元件(19)。
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