1.
When the helium content in the tri-mixed gas excesses 75%, the arc presents the characteristic of helium.
氦的体积分大于75%时，其电弧形成具有氦弧的性质。
2.
Study of forming mechanism of molten pool of TIG helium-arc small-gap butt welding for Tantalum sheet
钽薄板小间隙TIG氦弧对接焊熔池形成机理的研究
3.
Space Propulsion Applications of Helium Arjects
氦电弧射流用于空间推进
4.
Gaseous helium is used as an inert shielding gas in metal arc and laser welding.
在金属电弧和激光焊接中气态氦用作惰性屏蔽气体。
5.
When the helium content is less than 45%, the character of tri-mixed gas has no evident difference compared with that of argon.
混合气体中氦气的体积百分比小于45%时，其电弧特性与氩弧差别不大。
6.
The antimatter equivalent of helium.
反氦与氦等价的反物质
7.
Continuously tunable helium replenisher for long lifetime He-Cd laser
长寿命氦-镉激光器连续可调氦补充器
8.
Preparation of Helium-charaged Nanocrystalline Film and Study of Its Helium Storage Characteristic;
含氦纳米膜的制备及其固氦特性研究
9.
Thermodynamic Property of Helium-3 and Pulse Tube Refrigeration with Helium-3 and Helium-4 Mixtures;
氦-3热力学性质和氦-3/氦-4混合工质脉管制冷性质研究
10.
He-Ne laser accupuncture therapy
氦氖激光针灸理疗仪
11.
high pressure helium gas scintillation counter
高压氦气闪烁计数器
12.
Helium was discovered on the sun.
氦是在太阳上发现的。
13.
low voltage He filled proportional counter
低压充填氦正比计数器
14.
Examination for helium leak detecting
GB/T15823-1995氦泄漏检验
15.
emissive helium-plasma detector
放射氦等离子体检测器
16.
helium-mercury direct nuclear laser
氦汞直接核抽运激光器
17.
Helium and neon are inert gases.
氦和氖为惰性气体。
18.
helium mass spectrometer leak detector
GB/T13979-1992氦质谱检漏仪