Granular
发表于 2025-3-25 06:07:27
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TOXIN
发表于 2025-3-25 11:32:45
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Between
发表于 2025-3-25 13:26:10
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FEAT
发表于 2025-3-25 16:27:31
Condensation,itrogen, and oxygen are condensed to solids at the temperatures of liquid neon, liquid hydrogen, or liquid helium. Finally, all substances, other than helium, are solids at the temperature of liquid helium.
食道
发表于 2025-3-25 21:31:30
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杀子女者
发表于 2025-3-26 02:16:18
0538-7051 ially important. In addition to observing the normal precautions, one must also take into account the variations of physical properties that occur at low temperatures. At these tempera tures, some properties not only exhibit large differences from their normal values but also can vary widely over a
colloquial
发表于 2025-3-26 06:09:52
Introduction,stem itself, but also upon its interaction with other systems. Therefore, a knowledge of accepted safety practices and experience with existing systems is invaluable to safe operation either in new or existing cryogenic systems.
neuron
发表于 2025-3-26 11:57:39
Physiological Hazards,ms is that the low temperature can cause freezing of living tissue. Also, in the case of cryogens other than oxygen, the large expansion that occurs upon evaporation and warming to ambient temperature can result in dilution of the oxygen in the surrounding atmosphere to the point where it cannot sup
Mercantile
发表于 2025-3-26 15:40:56
Embrittlement of Materials,ice dislocations. As the temperature is raised, the thermal energy of the vibrating atoms assists this movement. Hence, as the temperature is lowered, the decreased thermal vibration of the metal lattice adds to the strength of the material.. However, in the design of cryogenic equipment it is usual
指数
发表于 2025-3-26 18:51:35
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