浮雕
发表于 2025-3-28 16:34:35
Thermal Conductivity of Solids at Low Temperatures,r is mainly by the conduction electrons and lattice conduction, though present, is unimportant, and (iii) alloys and other badly conducting metallic solids, where the electronic conductivity is so small that both processes are important.
600
发表于 2025-3-28 18:44:13
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inferno
发表于 2025-3-29 00:20:34
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LEERY
发表于 2025-3-29 06:58:06
Helium Liquefiers and Carriers,cquired helium liquefying apparatus. At the present time liquid helium is being produced regularly in almost a hundred scientific laboratories and in quantities which would have seemed fantastic a few years ago.
Electrolysis
发表于 2025-3-29 10:34:06
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抵押贷款
发表于 2025-3-29 14:33:55
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