
International Electrotechnical Vocabulary - Chapter 561: Piezoelectric devices for frequency control and selection
出版:International Electrotechnical Committee

专家解读视频
It has the status of a horizontal standard in accordance with IEC Guide 108.
IEV KAPITEL 561 - Identical
BS 4727-1:Group 08:1992 - Equivalent
NFC 01 561:1991 - Identical
UNE 21302-561:1992 - Identical
BIS IS 1885-44:2001 - Identical