91/28919 DC : AUG 91被替代
REVISION OF IEC 758 SYNTHETIC QUARTZ CRYSTAL. CHAPTER I: SPECIFICATION FOR SYNTHETIC QUARTZ CRYSTAL. CHAPTER II: GUIDE TO THE USE OF SYNTHETIC QUARTZ CRYSTAL. CHAPTER III: SPECIFICATION FO LUMBERED SYNTHETIC QUARTZ CRYSTAL (IEC 49(CENTRAL OFFICE)218)
出版：British Standards Institution
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