调戏
发表于 2025-3-21 18:17:40
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饮料
发表于 2025-3-21 20:45:27
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conservative
发表于 2025-3-22 04:09:05
Hazards,d mechanical failure may have such serious consequences that the following steps should be followed scrupulously, however strong the temptation to take short cuts on account of lack of time, access to test equipment, etc.
Meander
发表于 2025-3-22 05:00:59
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巡回
发表于 2025-3-22 12:03:55
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EXPEL
发表于 2025-3-22 13:54:24
Room-Temperature Machinery,ler than that at atmospheric pressure to the extent required to give the desired performance. In an external-work system the function of the compressor is to reduce the entropy — in this role Simon referred to compressors as “entropy squeezers.”
EXPEL
发表于 2025-3-22 20:55:54
uid nitrogen - notably to 4. 2°K and below. It does not deal with experimental techniques at low temperatures, but I have tried to bring the reader face to face with the brutishrealities of the necessary hardware. As weIl as giving information about sources of supply of equipment, I have gone into s
一美元
发表于 2025-3-23 00:02:10
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Libido
发表于 2025-3-23 02:18:19
Kathinka Sinha-Kerkhoff,Kate Kirkd mechanical failure may have such serious consequences that the following steps should be followed scrupulously, however strong the temptation to take short cuts on account of lack of time, access to test equipment, etc.
invade
发表于 2025-3-23 07:23:30
Helium Gas Recovery Systems,t to recover the helium gas evaporated from the cryostats supplied from the liquefier, purify it to an extent acceptable to the liquefier, and store it under pressure at room temperature. In the case of a closed refrigeration system, storage of the charge of gas at room temperature when the plant is not running is likely to be the only problem.