To compare the effect of helium-oxygen mixtures containing 80%helium or 60%helium on vital capacity(VC) and related index.
比较含80%氦和含60%氦的氦氧混合气体对肺活量及其相关指标的影响。
This paper presets a simple method for measuring the refractive index of transparent by beams excited from helium-neon laser.
本文给出了用氦氖激光束测量透明板折射率的一种简便方法。
AIM: To compare the effect of helium-oxygen mixtures containing 80% helium or 60% helium on vital capacity (VC) and related index.
目的：比较含80%氦和含60%氦的氦氧混合气体对肺活量及其相关指标的影响。
The automatic system of measurement of the refractive index & thickness of NMSTF applies the reflection method to measure the parameters with the helium-neon laser as the incident light source.
“全自动纳米多孔氧化硅薄膜折射率和厚度测定系统”采用的测量方法是光的反射法，在选用氦氖激光作为、入射光源时，考虑到氦氖激光的单色性不会因为经过分束镜后发生变化；
The automatic system of measurement of the refractive index & thickness of NMSTF applies the reflection method to measure the parameters with the helium-neon laser as the incident light source.
“全自动纳米多孔氧化硅薄膜折射率和厚度测定系统”采用的测量方法是光的反射法，在选用氦氖激光作为、入射光源时，考虑到氦氖激光的单色性不会因为经过分束镜后发生变化；
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