iezoelectric;Resonance resistance;Testing;Values;Watches【摘要】: This International Standard applies to measurements and test methods for tuning fork quartzcrystal units in the range from 10 kHz to 200 kHz and standard values for frequency controland selection.【中国标准分类号】: L21【国际标准分类号】: 31_140【页数】: 24P.;A4【正文语种】: 英语 | 欢迎光临 世界资料网论坛 (http://bbs.infoeach.com/) | Powered by Discuz! X2.5 |