Timepiece tester and method
作者： Jucker Erich
DOI:
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摘要:
lens.org 参考文章(4)
Lynn E Ellison, Watch testing apparatus ,(1962)
Greiner Rudolf, Method for measuring the accuracy of time-pieces ,(1963)
Hetzel Max, Device for measuring the error of a clock movement ,(1953)
Max Hetzel, Device for measuring the amplitude of the vibrations of a watch escapement ,(1953)