想自己做个波仔真针,不知道用什么材料最好
想自己做个波仔真针,不知道用什么材料最好,内六角,还是弹簧钢,还是机器轴。请问下各位师傅们。什么材料最好,又硬又不会变形https://pic.suoyiren.com/pic/20210611/162341654401722_581.jpg?watermark/1/image/aHR0cHM6Ly9waWMuc3VveWlyZW4uY29tL3BpYy8yMDE5MDQxNC9xaV9uaXVfMTU1NTIzOTE3NDgyOF83NjBfNzk0XzYzNy5wbmc=/dissolve/50/gravity/SouthEast/dx/20/dy/20https://pic.suoyiren.com/pic/20210611/1623416544077850_297.jpg?watermark/1/image/aHR0cHM6Ly9waWMuc3VveWlyZW4uY29tL3BpYy8yMDE5MDQxNC9xaV9uaXVfMTU1NTIzOTE3NDgyOF83NjBfNzk0XzYzNy5wbmc=/dissolve/50/gravity/SouthEast/dx/20/dy/20
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