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发表于 2016-8-6 14:14:36
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本帖最后由 albert.tang 于 2016-8-6 14:35 编辑
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Heli-Coil® inserts are precision formed screw thread coils of stainless steel wire having a diamond shaped cross section.1 U8 v7 t4 k! r3 M: b" N& Q
When they are installed into Heli-Coil® tapped holes, they provide permanent conventional 60' internal screw threads that accommodate any standard bolt or screw.
9 A, Y7 |7 S, t$ G. A- S/ lUS 亚马逊网站有介绍:
& h8 S1 i" B0 X7 L9 A4 thttps://www.amazon.com/Heli-Coil/b/ref=bl_dp_s_web_3030648011?ie=UTF8&node=3030648011&field-lbr_brands_browse-bin=Heli-Coil
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