The leakage - proof ringy cement wall and its function and woring mechanism are introduced . and its technological characteristics and economy are analyzed 摘要系统地介绍了环式水泥土防渗墙及其作用机理,着重介绍了环式水泥土防渗墙的特点,并对其工艺特点、经济性进行了阐述和分析。
A calculation method and calculation results that show that a new kind of shaped paraboloid antennas can produce a ringy radiation pattern is presented 摘要通过数值计算发现:将抛物线绕通过焦点的非抛物线对称轴旋转而形成的赋形抛物面天线可产生环状的方向图主瓣(此主瓣指的是主瓣最大值处) 。
Two novel development accelerants with function were synthesized from 6 - amido - benzimid - azole , phenyl - hydrosulfuryl - triazole and ringy hydrazide . the structures were confirmed by ir , ms and elemental analysis 以6 -氨基苯并咪唑和苯基巯基三唑为吸附基团,以环状酰肼为显影促进基团,合成了两个新型功能性显影促进剂,其结构经ir , ms和元素分析确证。
Two novel development accelerants with function were synthesized from 6 - amido - benzimid - azole , phenyl - hydrosulfuryl - triazole and ringy hydrazide . the structures were confirmed by ir , ms and elemental analysis 摘要以6 -氨基苯并咪唑和苯基巯基三唑为吸附基团,以环状酰肼为显影促进基团,合成了两个新型功能性显影促进剂,其结构经ir , ms和元素分析确证。