抄録
Recently the recycle amount of electric, mechanical parts and appliances in artifacts have increased. These parts use valuable rare metals such as PGM and Au that are included occasionally little additives. Rare metals are maldistributed in the world and most of them produced in small quantities. A small amount of rare metals usage in the appliances causes a large loss of rare metal resources because of the difficulty of recycle method economically. The actual recycle technological methods including physical and chemical separation methods should be considered in the design of electric, mechanical parts and appliances.
