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Straight Road of Qin Dynasty
释义
Straight Road of Qin Dynasty
Encyclopedia
历史学
〔其他遗址〕
释
Straight Road of Qin Dynasty
秦直道遗址
秦始皇三十五年(公元前212)令蒙恬率三十万大军兴建的连接关中与北方草原地区的交通纽带,也是支援北方长城沿线地带军事防务的运输线,与长城共同构成了秦朝北疆的防御体系。
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photocathode
photocell
photocenter
photocentric orbit
photoceramics
photochemical
photochemical action
photochemical aerosol
photochemical aging of polymer
photochemical asymmetric synthesis
photochemical cell
photochemical cis trans isomerization
photochemical cis-trans isomerization
photochemical detector
photochemical dose
photochemical effect
photochemical efficiency
photochemical equivalence law
photochemical etching
photochemical induction
photochemical isomerization
photochemical molecular device
photochemical oxidant
photochemical oxidants
photochemical pollution
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