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本帖最后由 albert.tang 于 2016-8-6 14:35 编辑 ; a- g+ x: E- S+ b
2 R8 X4 f/ v8 u0 E/ O* j4 gHeli-Coil® inserts are precision formed screw thread coils of stainless steel wire having a diamond shaped cross section.- b! y- q2 |! \! d8 k+ Y) t2 D
When they are installed into Heli-Coil® tapped holes, they provide permanent conventional 60' internal screw threads that accommodate any standard bolt or screw.
, \) j w, R+ y/ CUS 亚马逊网站有介绍:
( w4 l* q1 F" G' e$ H- yhttps://www.amazon.com/Heli-Coil/b/ref=bl_dp_s_web_3030648011?ie=UTF8&node=3030648011&field-lbr_brands_browse-bin=Heli-Coil9 G6 x, U8 u# a
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