17-4-5-vyvorachivanie-i-vvorachivanie-shpilek.html
17.4.5. A reversing and вворачивание hairpinsThe hairpin has no surface for which the key could be hooked, therefore for a hairpin reversing execute the following.
1. On a free carving part screw two nuts and Tighten the them, turning towards each other.
2. Having fixed thus nuts, turn out a hairpin.
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