N. A.
英
美
[医] 数值口径, 光口
双语例句
- Continuity of the solution of nonmonotonic contraction operator equations in N. A. Menger PM-space and Its Applications
N.A.MengerPM-空间中非单调压缩算子方程组解的连续性及其应用 - This paper describes a setup for measuring fiber N. A. by optical spot technique using M_ ( 416B) refractive index analyzer with some additional optical components.
本文介绍了在M（416B）折射率分布测试仪上，附加一些光学元件，组成光斑法测光纤数值孔径的测试装置。 - A nitrogen-contained stainless steel ( P. A. N. A. C. E. A.), which powders were manufactured by gas atomizing process, was processed by powder injection molding technology.
对惰性气体雾化法制备的不锈钢（P.A.N.A.C.E.A）粉末进行了注射成形-烧结渗氮工艺研究。