- 2018年4月14日
- 2018年4月14日
- 0件
世界アマチュア無線の日
World Amateur Radio Day 世界アマチュア無線の日 Every April 18, radio amateurs worldwide take to the airwaves in celebration of World Amateur Radio Day. It was on […]
World Amateur Radio Day 世界アマチュア無線の日 Every April 18, radio amateurs worldwide take to the airwaves in celebration of World Amateur Radio Day. It was on […]