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railway sand prevention
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railway sand prevention
Encyclopedia
农学
荒漠化治理
释
railway sand prevention
铁路防沙
采取工程、生物等措施阻止风沙对铁路的侵蚀,确保风沙区铁路的畅通,促进沿线地区的生态环境安全和国民经济的持续稳定发展。
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chandler wobble
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Chandrasekharan
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chandrasekhar limit
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Chandrasekher dynamical friction
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Chandra X-ray Observatory
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Chandrayaan probe
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Chang'an City of Sui and Tang Dynasties
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