由四川省地震局和国营星华仪器厂共同研制成功的XH3501型自校数字钟,于1985年4月中旬在四川省青神县通过鉴定。出席鉴定会议的同行专家对XH3501型自校数字钟的整套资料、文件和报告等进行了认真审议和讨论,认为该自校数字钟结构合理,采取了专门的低功耗恒温晶振,各项 The XH3501 self-calibration digital clock successfully developed by the Seismological Bureau of Sichuan Province and State-owned Xinghua Instrument Factory passed the appraisal in Qingxian County, Sichuan Province in mid-April 1985. Attendance appraisal meeting of peer experts on the XH3501 type self-school digital clock package of documents, documents and reports were carefully considered and discussed, that the structure of the digital bell is reasonable, has taken a special low-power constant temperature crystal, the