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October15,1970wasdeclaredInternationalWhiteCaneSafetyDa...
问题详情:October15,1970wasdeclaredInternationalWhiteCaneSafetyDay(IWCSD)forthefirsttimebythePresidentoftheInternationalFederationoftheBlind(IFB).ThisdatewasadoptedatthefirstconventionoftheIFB,heldinColomboonO...