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SOD、節電虫の22年                                             Twenty two year long history of SOD




The attached picture shows the first SOD I hand-made on June 30, 1994 and 22 years have passed since then.

You would see the development history in the table at!Ai_aaa4f_vZzrzSus-rkyG-okOzv.

And the latest model of Internet SOD can be seen in the movie at