myopia
发表于 2025-3-28 18:14:54
https://doi.org/10.1007/978-981-10-4923-1 liquid helium temperatures primarily for cooling superconducting devices. In each case, the reader should observe that critical technologies were developed to facilitate these applications. In addition to these three primary advances, other significant helium cryogenic technologies are briefly revi
ULCER
发表于 2025-3-28 21:28:11
Privileges Sustained by Central Planning: An Analytical Method of Property Rightsprivileges maintained by executive order, which is the basic system arrangement of central economic planning: urban and rural separation, the household registration system, farmers cannot change their identity, favorable planned price, unemployed professions, welfare subsidized by government, region
混合,搀杂
发表于 2025-3-28 23:35:24
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