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Japan The purpose of th｛ s study is to obtain knowledge about し he possibili亡y of energy cenversion systems based on rnagnetic churacteristics of magnetic w 〔 〕rl｛ing substance ． We c 〔 〕nducted the experitnental stu 〔 ly oti two energ ｝ ・ com ・ ersion systems using gado ］ iniuln as a 1 、1aglletic materiaL 〔1 ） Room 亡 emperature Illaglユetic r 巳frigeratiun system airnE t〔 ｝ generate co ⊂｝ ling energy for air condition ・ ing，（2 ） Temperature difFerence enc ビ gy convcrsiolr aims to use surplus heated or cooled air for power generativn ． The experimentul res しLlts indirated the availabilit ． ies and the characteristics of these two energy c 〔 mversion systelns ．

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