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碱化作用
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碱化作用
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碱化作用
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Alkalization
碱化作用
土壤溶液中的钠离子进入土壤胶体,置换出一定量的钙、镁等离子的过程。
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spacecraft autonomous control
spacecraft autonomous navigation system
spacecraft communication, telemetering, command and tracking system
spacecraft control system
spacecraft design
spacecraft entry technique
spacecraft formation flight control
spacecraft launch
spacecraft launching site
spacecraft magnetic test
spacecraft manufacturing
spacecraft material
spacecraft navigation
spacecraft nutation
spacecraft operation
spacecraft orbit control
spacecraft project development phases
spacecraft ranging
spacecraft recovery system
spacecraft relative motion
spacecraft returning technique
spacecraft scale style movement
spacecraft systems engineering
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spacecraft thrust vector control
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