The orifice shape and aperture size is one vibration source on aerostatic bearing.

在空气静压导轨中，节流孔形状和孔径大小是主要振源之一。

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The effect of the different aperture size and the area of the membrane, operation pressure were studied.

实验中比较了不同膜管孔径、膜管面积、操作压力等对乳酸杆菌发酵液浓缩效果的影响。

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Is it true that there is no direct conversion between the aperture size (diameter) and meshes of silk screen?

丝网孔度(直径)和目之间是否无法直接换算？

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By combining the observational power of six 5-inch aperture telescopes spread over hundreds of feet, the NPOI is able to measure the size of stars down to one milliarcsecond on the sky.

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Future aperture upper limits on balloon-borne telescopes are expected to be some 2.5-meters, about the size of the Hubble Space Telescope.

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