It’sabicyclist’sdream:abikethatcan’tbestolen.TheYerka,d...
问题详情：It’sabicyclist’sdream:abikethatcan’tbestolen.TheYerka,designedbythreeyoungChileanengineeringstudents,isthelatestentryinatrendofbikes.Theyusetheirsaddleseatasalock.Theycanalsousetheirhandleb...