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邮政史
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邮政史
Encyclopedia
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postal history
邮政史
邮政发展的历史。邮政是依赖实物传输网进行书面通信和快速送达小件物品的系统。“邮”指通信方式和组织,“政”指由国家政权进行统治。数千年来,绝大多数邮政系统为政府运行。至今,邮政大力发展,已经具有通政通民通商的特征,也是国民经济运行不可或缺的行业。
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electronic socks
electronics of superconductivity
Electronic sound synthesizer
electronic sow feeder
electronic specific heat
electronic speckle interferometer
electronic speckle interferometry
electronicspeckle patterninterferometry
electronic speckle-shearing patten interferometry
electronic spectra
electronic spectrum
electronic sphygmomanometer
electronic sphygmomanometer, electronic blood pressure meter
electronics reliability engineering
electronics Shanghai
electronic stability control system
electronic stability program,ESP
electronic state
electronic state density distribution
electronic stimulator
electronic stopping power
electronic structure
electronic structure of defects in solids
electronic structure of solid surface
electronic structure theory
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