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。
2
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。
3
The results show that cryogenic treatment can improve the microstructure and properties of Pb brass.