UNE EN 61837-4 : 2015現行
SURFACE MOUNTED PIEZOELECTRIC DEVICES FOR FREQUENCY CONTROL AND SELECTION - STANDARD OUTLINES AND TERMINAL LEAD CONNECTIONS - PART 4: HYBRID ENCLOSURE OUTLINES (ENDORSED BY AENOR IN JUNE OF 2015.)
出版：Asociacion Espanola de Normalizacion
專家解讀視頻
