Also known as "h and chi Persei", this unusual double cluster, shown above, is bright enough to be seen from a dark location without even binoculars.
上图所示的这一亦称“h和chi英仙座”(“ h andchi Persei ”)的不同寻常的双星星群的亮度高到可以在一个暗处不用双筒望远镜就看到。
Then analyzing the characteristic of substrate integrated waveguide H-T, E-T and double Tee, and test the substrate integrated waveguide H-T.
分析了基片集成波导h -T和E - T和双t接头的特性，并对基片集成波导h - T接头进行了加工测试。
H bonds on facing folded chain crystal surfaces lead to a decrease of surface free energy and this fact is a main reason for the formation of double lamellae.
在双层片晶界面上的H键降低了表面自由能，这是形成双层片晶的主要原因。
H bonds on facing folded chain crystal surfaces leda to a decrease of surface free energy and this fact is a main reason for the formation of double lamellae.
在双层片晶界面上的H键降低了表面自由能，这是形成双层片晶的主要原因。
The balance of K -H-V double-cycloid ball planetary reducer is analyzed and calculated in the paper.
本文对双摆线钢球减速器的平衡设计进行了分析和简化。
The device can be used for single or double-line production, the production efficiency can reach 1200-2500/h.
该设备可以采用单线生产或双线生产，生产效率高达1200-2500个/小时。
The invention relates to a double-rectangular tube restraining type assembled buckling-restrained brace with an H-shaped cross section, belonging to the technical field of structural engineering.
双矩形管约束型H形截面装配式防屈曲耗能支撑，属于结构工程技术领域。
The invention relates to a double-rectangular tube restraining type assembled buckling-restrained brace with an H-shaped cross section, belonging to the technical field of structural engineering.
双矩形管约束型H形截面装配式防屈曲耗能支撑，属于结构工程技术领域。
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