Execution of steel structures - part 4 : supplementary rules for hollow section structures ; german version env 1090 - 4 : 1997 钢支承结构施工.第4部分:中空截面结构补充规则
Specification for glass fibre reinforced cisterns of one piece and sectional construction , for the storage , above ground , of cold water 地面储存冷水用单壁截面结构玻璃纤维增强水箱规范
The double - clad fiber ( dcf ) with truncated inner cladding has much better absorption efficiency to optical waves than dcf with circular inner cladding 摘要缺陷型内包层双包层光纤由于其特殊的内包层横截面结构,对于光波的吸收效率要比理想圆型内包层双包层光纤提高许多。