1) small circular aperture
小圆孔
1.
Based on the accurate diffraction formula and the accurate expression of light intensity on the transverse plane, the characteristics of axial light intensity of planar wave diffracted by small circular aperture are investigated.
基于精确的衍射场公式和横截面上光强的精确表述 ,分析讨论了单色平面光波经小圆孔衍射后 ,其衍射光束轴上光强的最大值以及轴上光强极值的数目和小圆孔半径的关系 ;并且由此考察了一般的菲涅耳数计算公式的使用条件。
2) conical keyhole
圆锥小孔
3) small round opening
圆形小孔
1.
Seismic behavior of frame connection with some small round openings on beam web;
钢梁腹板开圆形小孔削弱型节点的抗震性能
4) holestitch
小圆孔组织
5) small hole on middle-thick steel plate
中厚钢板小圆孔
1.
Technological study on high power CO_2 laser cutting of small hole on middle-thick steel plates;
中厚钢板小圆孔的高功率CO_2激光切割工艺研究
6) cylindrical shell with small opening
圆柱壳小开孔
补充资料：卵圆孔
卵圆孔
oval foramen
位于房间隔下部。胚胎时的左右心房借卵圆孔相通，出生后1年左右卵圆孔完全封闭成卵圆窝。
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