最近，国家十三五重点研发计划某城市轨道交通领域集设计、运输管理一体化BIM数据管理平台建设和管理中心子系统完成初步检查，该系统基于东晨工元BIMe合作平台建设。
I\'m doing an eshop with goods displayed as \"tiles\" in grid as usual. I just want to use various sizes of tiles and make sure (via jQuery) there are no free spaces.
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