IS 4570 : Part 13 : Sec 5 : 1993 Crystal Unit Holders - Specification - Part 13 : Quartz Crystal Unit Holder Outline for Automatic Handling - Section 5 : Metal, Sealed, Two Pin Crystal Unit Holder Type CU 05
| UDC 621.373.5 : 621.316.58 | LITD 24 |
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| Reaffirmed 2015 |