Bidders are shown only a cross section of the ribs.
投标者只能看到牛肋骨的横截面。
Meanwhile this paper points out that cellular voided plates are the plates with ribs and the ribbed or waffle plates are the cross girder system with slabs as its wingspan.
同时本文也指出了蜂窝式空心板是以平板弯曲为主的带肋的板，而密肋楼板或井式楼板则是以交叉梁弯曲为主的带板的梁系。
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