Overheated springs should be replaced, since they may have lost tension and will not operate satisfactorily. Spring pressure can be tested with a spring-tension tester.
过热的弹簧应该更换，因为失去弹性的弹簧运行时达不到满意的效果。可使用弹簧弹力计进行检测。
2
In the early 1400s came the invention of the coiled spring or fusee which maintained constant force to the gear wheels of the timekeeper despite the changing tension of its mainspring.