1) trammel net
三层曳网
2) sweeping trammel net
拖曳式三层刺网
3) ground seine
底层曳网
4) demersal seine
底层旋曳网
5) seine
[英][sein] [美][sen]
曳网
6) triple-layer space truss
三层网架
1.
The vertical earthquake responses analysis of leaning-laid pyramid triple-layer space trusses;
斜搁四角锥三层网架的竖向地震响应分析
2.
The structure characteristic analysis for pyramid system triple-layer space trusses;
四角锥体系三层网架的结构特性分析
3.
For the advantages of larger stiffness, reasonable distribution of internal force, favorable technical economic characteristics and manufacture convenient etc, triple-layer space trusses are used increasing widely in large span space structures.
三层网架是双层网架的有机组合，是空间结构领域的又一重要开拓。
补充资料：三层大，二层小
1.谓家庭中人口众杂，上辈之上还有上辈，下辈下面还有下辈。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条