Ken NAGASAWA @ngswkn
Engineer, Photovoltaic, Diving (skin, scuba), Ayu-Tuki(spearfishing),
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癌の原因は放射線に限らない:統計の読み方・使い方・考え方
4481pv 98 1 user 104
Engineer, Photovoltaic, Diving (skin, scuba), Ayu-Tuki(spearfishing),