1) Helium leak tightness
氦密封
2) helium compressor auxiliary seal oil pump
氦气压缩机辅助密封油泵
3) dense Helium
高密度氦
1.
It is found out by means of having studied changing laws of the three-body potentials,four-body potentials and R (the distance between two atomic) separately,calculated with the dense Helium physical state equation,when R>4.
应用原子团簇理论计算了He4体系的短程多体排斥作用,通过对三体势、四体势与原子间距R之间的变化规律的研究,发现按高密度氦物态方程来计算,当R>4。
4) helium closed loop
氦封闭回路
5) seal
[英][si:l] [美][sil]
密封
1.
Modification of inner bearing seal structure in centrifuge for PTA production;
PTA装置离心机内部轴承密封结构改造
2.
The seal between the car for sintering machine and the air box;
烧结机台车与风箱的密封
3.
Research on seals of hydraulic leg and jack for hydraulic powered support;
液压支架立柱和千斤顶密封技术研究
6) sealing
[英]['si:liŋ] [美]['silɪŋ]
密封
1.
Analysis of Fuzzy Reliability for Gasket Sealing;
垫片密封的模糊可靠性分析方法
2.
Development and application of anti-side wear sealing device in oil well;
抽油井光杆调偏防喷密封器的应用
补充资料：氦3-氦4稀释制冷
分子式：
CAS号：
性质：3He-4He混合液在0.867K时出现界限分明的上下两相，上相3He含量高称浓相，下相4He含量高称稀相。稀相中4He的熵比3He的熵小得多，浓相中4He的熵又比稀相中3He的熵小得多。3He从浓相进入稀相或从稀相中抽走都会发生降温。用泵把3He-4He混合室与一个蒸发器和一个冷凝器连接起来就组成稀释制冷器。用抽气泵不断地把蒸发器中的3He抽走，蒸发过程中3He带走大量热量。从蒸发器中抽走的3He经冷凝器液化后再回到混合室。用此法可获得0.0035～0.0055K的超低温。
CAS号：
性质：3He-4He混合液在0.867K时出现界限分明的上下两相，上相3He含量高称浓相，下相4He含量高称稀相。稀相中4He的熵比3He的熵小得多，浓相中4He的熵又比稀相中3He的熵小得多。3He从浓相进入稀相或从稀相中抽走都会发生降温。用泵把3He-4He混合室与一个蒸发器和一个冷凝器连接起来就组成稀释制冷器。用抽气泵不断地把蒸发器中的3He抽走，蒸发过程中3He带走大量热量。从蒸发器中抽走的3He经冷凝器液化后再回到混合室。用此法可获得0.0035～0.0055K的超低温。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条