https://item.rakuten.co.jp/kurosawastore/sq-cv-st50-2ts/?scid=af_sp_etc&;sc2id=af_113_0_10001868

https://item.rakuten.co.jp/kurosawastore/squ-fcv-50stbk/?scid=af_sp_etc&;sc2id=af_113_0_10001868

fsrって普通のcvとどこ違うの？