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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 # D' {( o2 m# T# f: I- |% T2 s
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Heli-Coil® inserts are precision formed screw thread coils of stainless steel wire having a diamond shaped cross section. Y/ }1 @9 w% l! O, U& `4 l
When they are installed into Heli-Coil® tapped holes, they provide permanent conventional 60' internal screw threads that accommodate any standard bolt or screw.( \8 I( ]. j/ h+ S' H) ^
US 亚马逊网站有介绍:' U9 l2 N) Y* H5 ?
https://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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