Personnel must be thoroughly familiar with the properties and safety considerations before being allowed to handle a cryogenic liquid and its associated equipment.
在允许操作低温液体和它的相关设备之前，人员必须对性质和安全的考虑完全熟悉。
This thesis introduces the moulding technique, mechanical and thermal properties of the rigid polyurethane foams used in cryogenic insulation.
本文介绍低温绝热用硬质聚氨酯泡沫塑料的力学、热学性质及其成型工艺。
The results show that cryogenic treatment can improve the microstructure and properties of Pb brass.
结果表明，深冷处理能改善铅黄铜的组织和性能。
This paper summarized the characteristics of physic mechanical properties of aerospace structural materials and the testing technique at cryogenic temperature conditions.
概述了航天结构材料在深低温条件下的力学、物理特性及深低温力学性能研究的内容和特点。
The Pb brass has been treated with cryogenic treatment, the mechanical properties testing and microstructure analysis have been done.
对铅黄铜作了深冷处理，并进行力学性能试验和金相组织分析。
On the basis of the noise linearity of low noise amplifier(LNA), the variable load temperature method is introduced to measure noise properties of cryogenic LNAs.
在低噪声放大器噪声线性的基础上，介绍了负载温度可变法，用于测量低温低噪声放大器的噪声。
The comprehensive mechanical properties analysis mainly includes Cryogenic impact test, Vickers hardness test, the Tensile testing at ambient temperature and the Bending test.
综合力学性能分析主要包括低温冲击试验、维氏硬度试验、室温拉伸试验和弯曲试验。
To understand the change of the magnetic properties and mechanical properties of magnets after the subzero treatment, and the effect of sintered Nd-Fe-B magnet with the cryogenic treatment.
以了解其深冷处理后磁性能和力学性能的变化，以及深冷处理对烧结钕铁硼的作用机理。
To understand the change of the magnetic properties and mechanical properties of magnets after the subzero treatment, and the effect of sintered Nd-Fe-B magnet with the cryogenic treatment.
以了解其深冷处理后磁性能和力学性能的变化，以及深冷处理对烧结钕铁硼的作用机理。
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