第四代螺纹技术——螺塞反角螺纹设计，更易于安装，对棒抱紧力更强，进一步减少钉头体积。
Generation 4 Clousure Technology—A reverse-angle set screw designed to thread easier, hold stronger, and reduce the implant even.
第四代螺纹技术——螺塞反角螺纹设计，更易于安装，对棒抱紧力更强，进一步减少钉头体积。
Generation 4 Clousure Technology—A reverse-angle set screw designed to thread easier, hold stronger, and reduce the implant even.
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