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Through the setting of program,a piece of hull of that clock will shed after certain amount of time elapse.Several years later,until the whole hull have shed competely,the clock stops ticking.Of course ,the shed hull can be reused to assemble
Ningbo Institute of Technology, Zhejiang University
Ning Bo City, China
Zhuo zuyue Zhuo zuyue,
Ningbo Institute of Technology, Zhejiang University