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Rのfilter関数による移動平均（１）単純平均: 書き付け
Martin OM-45 Deluxe (Norman's Rare Guitars Custom) 1 of OM-45 Deluxe (Norman's Rare Guitars Custom) 1 of 1: LAST GUITARのブログ
Martin OM-45 Deluxe (Norman's Rare Guitars Custom) 1 of OM-45 Deluxe (Norman's Rare Guitars Custom) 1 of 1: LAST GUITARのブログ
