常見(jiàn)例句雙語(yǔ)例句Specially, a vertical cavity surface-emitting semiconductor laser is attractive, because of free arrangement and dense packing.垂直腔表面發(fā)射激光器,因其可自由排列和密集封裝而特別引人注目。When the density of the packing material is smaller than that of the liquid, the packed bed becomes less dense and will expand before flooding.當(dāng)填料密度比液體密度小時(shí),在液泛前填料會(huì)發(fā)生松動(dòng)和膨脹,通過(guò)修正填料床的孔隙度可以計(jì)算膨脹填料床的壓降。By using particle dense packing theory, the influence of particle size distribution of cementitious material on microstructure and strength of cement gel were discussed in this paper.根據(jù)顆粒緊密堆積理論,探討膠凝材料的顆粒級(jí)配對(duì)水泥凝膠體微觀結(jié)構(gòu)及強(qiáng)度的影響。 返回 dense packing