2) Anatidae birds
雁形目鸟类
1.
Researches on stopover during migration of Anatidae birds were carried at Yellowriver wetland, freshwater lake areas in Yulin city and Hanjiang river in winter from 1998 to 2003.
1998-2003年冬季,作者相继在关中平原东部的黄河湿地、陕北榆林淡水湖泊区以及汉江流域对雁形目鸟类的迁徙状况进行了研究。
3) parallel multi-crack
雁形缝
4) bird-shape plate
雁形板
1.
The design results of the bird-shape plates according to the new and old codes for design of concrete structure are compared respectively.
分别按新、旧混凝土设计规范对雁形板进行设计。
2.
By means of static loading and destruction test on two 18 m span bird-shape plates before and after strengthening, the change of the bird-shape s bearing capacity is analyzed which is strengthened by external tendon.
通过两根 18m跨雁形板在用体外预应力筋加固前后的静载及破坏实验 ,分析研究了体外预应力加固雁形板后的承载力变化 ,并按比拟梁法对加固构件的承载力进行了计算。
6) "Goose Model"
雁形模式
补充资料：雁形目
| 雁形目 Anseriformes；screamers 鸟纲的一目。中、大型游禽。羽毛致密；嘴多扁平，先端具嘴甲；前趾间具蹼，后趾形小而不踏地；雌雄外形不同，雄性具交接器。分布全世界，大多具有季节性迁徙的习性。在地面上或树洞中营巢；雏鸟为早成性。该目有2科：叫鸭科和鸭科。鸭科是一类重要资源，全世界约有150种。中国有绿头鸭、天鹅、豆雁等。 |
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