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Terminal coil
終末曲線／シュウマツキョクセン
终端游丝
Terminal coil
Courbe terminale
Glossary
Thematic
Regulation, Technic
The incurved ends of the balance-spring to improve isochronism. Invented by Breguet and perfected by Phillips and others, hence often referred to as a \Phillips curve\" or \"Breguet overcoil\".
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