The introduction of arch structure to china is late, which goes through air brick beam slab, needle shape arch, zip shape arch. The Chinese arch structure formed before the prophase of Xi Han dynasty.
拱券结构在中国出现比较晚，经历了空心砖梁板、尖拱、折拱几个发展步骤，西汉前期形成。
参考来源 - 中国民居中的拱券结构研究·2,447,543篇论文数据，部分数据来源于NoteExpress
N a brick with holes in it, put into the wall of a building for ventilation 空心砖 [英国英语]
The invention belongs to the technical field of building materials and in particular relates to an air brick prepared by utilizing industrial waste dreg.
本发明属于一种建筑用材料的技术领域，尤其涉及一种利用工业废渣制备的空心砖。
The invention belongs to the technical field of building materials and in particular relates to a porous air brick prepared by utilizing industrial waste dreg.
本发明属于一种建筑用材料的技术领域，尤其涉及一种利用工业废渣制备的多孔空心砖。
Grit, fly ash, cinder residue, active carbon, air brick detritus were used as filtering media according to proper proportion for low concentration domestic sewage treatment.
选取粗砂、粉煤灰、细煤渣、活性炭和空心砖粉块作为介质，再按适当的比例配成填料处理柱，进行处理低浓度生活污水的研究。
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