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invert arch slab 反拱底板
It is positive to tunnel if build the invert arch in time. 及时施作仰拱对隧道结构抗震有着积极的作用；
In structure design, if this property is full used, it can help to decrease the dosage of the prestressing tendon, save anchorage device, reduce cost and minish invert arch. 工程设计中，若能充分利用部分预应力混凝土的这一特性，将可以减小预应力筋的用量，收到节约锚具、降低造价、减小反拱的效果。
SITE POURING OF PRE-TENSIONED ARCH SLAB ROOF CONCRETE 先张法预应力拱板屋盖高空原位现浇技术
QUALITY CONTROL MEASURE OF ROOF TRUSS OF LARGE SPAN PRESTRESSED ARCH SLAB 大跨度预应力拱板屋架施工质量控制措施
The top of the table was formed by a stone slab. 桌面是一块石板。
She catch the insect by invert her cup over it. 她把杯子倒扣在昆虫上，将它逮住了。
The arch has a span of 60 metres. 那个拱的跨度为60米。
A slab of stone laid flat over a grave. 平放在墓上的纪念碑石
The boy walks through the undecorated arch. 那男孩走过未经装饰的拱门。
Analysis of effect on using temporary invert arch to limit ground surface settlement during driving tunnel with NATM 浅埋暗挖施工中用临时仰拱控制地表沉降有效性分析
Research on Elastic Slab Vibration of Inverted Arch Plunge Pool under High Water Head and Large Discharge 高水头大流量作用下反拱水垫塘弹性单底板块振动规律研究
They considered him their arch opponent. 他们将他看成是主要对手。
Marble Arch is a famous London landmark. 大理石拱门是著名的伦敦标志。
Go through the arch and follow the path. 穿过拱门，沿著那条路走。
Have you been to the Triumphal Arch? 你去过凯旋门吗？
The keystone in the crown of an arch. 拱顶石位于拱顶的塞缝石
An arch over an entrance or passageway. 拱门，牌楼入口或通道上的拱顶
The arch of short hairs covering this ridge. 眉毛覆盖于眉上的拱状短毛
The top of the table was a polished slab of marble. 桌面是一块磨光的大理石板。