aperture tube 中文意思是什麼
aperture tube
解釋
口管-
The unfocused aspherical surface system is one of the main structure of large emiting system. in the system, the more large the relative aperture of primary mirror, the more small the focal length and the tube of system, and the more light the weigth
這個系統中的主反射鏡的相對孔徑越大,其焦距就越短,相應地系統筒長就越短,重量就越輕,這樣就越能滿足車載或機載系統的實戰要求。 -
When a pollen grain germinates, a pollen tube pushes its way out through an aperture in the pollen grain wall, and the nuclei migrate into the tube
生殖細胞核分裂,形成兩個僅由細胞核和細胞質構成的精子,其中一個將與卵受精,另一個則與極核融合形成胚乳核。 -
Aperture grill picture tube
蔭柵顯象管
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