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diagram of solar wind
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diagram of tidal power
Diagram of the dynamo
Short desc: Diagram of the dynamo
This design is used by 2 stamps:
(See all uses as list)
6/12/1962 30l red&blk
6/12/1962 70l bl&blk
All are Italy issue=Antonio Pacinotti death 50th wmk=stars perf=14
Record of changes
