期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
浅议门、窗用PVC-U塑料异型材发展趋势 被引量:2
1
作者 任华升 杨宁 《建筑节能》 CAS 2011年第3期52-54,共3页
简述了PVC-U塑料异型材技术现状和发展趋势。着重阐述了塑料异型材正向大尺寸、厚壁厚、腔室、多密封方向发展。目前,塑料异型材表面彩色化已经普及,对推拉门窗性能有所提升。胶条后共挤得到了改进并广泛应用。塑料异型材在理论设计、... 简述了PVC-U塑料异型材技术现状和发展趋势。着重阐述了塑料异型材正向大尺寸、厚壁厚、腔室、多密封方向发展。目前,塑料异型材表面彩色化已经普及,对推拉门窗性能有所提升。胶条后共挤得到了改进并广泛应用。塑料异型材在理论设计、技术验证方面都取得了长足进步。 展开更多
关键词 PVC-U塑料异型材 发展趋势 多腔室 多密封 表面彩色化 胶条后共挤
下载PDF
PRELIMINARY STUDY ON THE KARYOTYPE OF ARDEA PURPUCEA AND ARDEA CINEREA, CICONIIFORES
2
作者 孔庆松 刘志平 《Journal of Northeast Forestry University》 SCIE CAS CSCD 1995年第2期65-67,共3页
The karyotype of Ardea purpucea and Ardea cinerea, Ciconiifores, are presented in this paper. Chromosome preparations were made from bone marrow cells and stained with Giemsa.The diploid number of chromosome of Ardea ... The karyotype of Ardea purpucea and Ardea cinerea, Ciconiifores, are presented in this paper. Chromosome preparations were made from bone marrow cells and stained with Giemsa.The diploid number of chromosome of Ardea purpucea and Ardea cinerea are 62 ± and 60 ±respectively. The numbers of macrochromosome of these two birds are same, namely 11 pairs. Among them,six pairs of macrochromosome are morphologically very similar between the two birds. 展开更多
关键词 CHROMOSOME KARYOTYPE BIRD Ardea purpucea Ardea CINEREA Ciconiifores
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部