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n.内弧面；拱之下面
1、extrados───n.[建]拱背
2、intradas───n.前奏；引子
3、intros───介绍（intro的名词复数）
4、intrudes───vt.把…强加；把…硬挤；vi.闯入；侵入；侵扰
5、intrada───n.前奏；引子
6、intrans───abbr.不及物动词（intransitive）
7、intradoses───n.内弧面；拱之下面
8、intraday───adj.当天的，一天内的
9、intrants───n.新生，新成员；参赛者；考生；进入者
1、and the friction plate (4) is beset on the intrados of the left clamping plate (1) and the right clamping plate (2) respectively.───摩擦片（4）分别镶嵌在左夹板（1）与右夹板（2）内弧面上。
2、arch with mutually supporting voussoirs that has a straight horizontal extrados and intrados.───有水平拱背和水平的内弧面的互相支撑的拱石的拱。
3、Crack Treatment of Member and Arch Sheeting on Intrados of Roof Truss-Arched Flume───桁架渡槽杆件和底拱板开裂的处理
4、of FEA method for cold-bending elbow predicted that the point of maximum stress is transferred from intrados to extrados with the increase of the wall thinning.───有限元方法分析了冷弯弯头的应力状况，得出其最大应力发生点随着外拱处壁厚减薄量的增大而向外拱处转移。
5、the mechanical properties at the intrados and extrados of the elbow are obvious different.───使该弯头外弧和内弧力学性能存在明显差异。
6、Study on Processing Approaches of Elliptical Intrados of Drum Brake Linings───鼓式制动片内弧椭圆加工方法研究
1、The results of FEA method for cold-bending elbow predicted that the point of maximum stress is transferred from intrados to extrados with the increase of the wall thinning.