【机】 筛孔

objective aperture

aperture size【矿】;dimension of screen hole【油气】;mesh size【粮食】

jacket-type aperture card【图情】

iris aperture

aperture of larynx, aditus of larynx

inferior pelvic aperture, pelvic outlet; 又称“骨盆出口”。

pulse generator using multi-aperture magnetic cores

aperture equaliser, derivative equaliser, group delay equaliser, delay