IEC 60122-3:2010 specifies the outline drawing for quartz crystal units with lead enclosures. The main changes with respect to the previous edition are as follows: 12 of the 48 enclosure types contained in the previous edition have been deleted.
IEC 60122-3 Ed. 4.0 b:2010 History
IEC 60122-3 Ed. 4.0 b:2010
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