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您好,
显示器U2415的话,并没有后缀字母。您看的型号不完整吧?
http://www1.ap.dell.com/content/topics/reftopic.aspx/gen/misc/rep/setrepcode?c=cn&l=zh&s=dhs&rep_id=331084&rep_type=CHAT&redirect_url=http%3A//accessories.ap.dell.com/sna/proctdetail.aspx%3Fc%3Dcn%26cs%3Dcndhs1%26l%3Dzh%26s%3Ddhs%26sku%3D391-BBUW%26redirect%3D1