单词intrados
n.: 【建】拱腹(线)
网络: 内弧面；拱的内表面；拱腹线
【建筑】拱腹(线)
内褶皱面
拱底
内弧面
拱腹内弧线
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。
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。
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
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