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gully land consolidation
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gully land consolidation
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治沟造地
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gully land consolidation
治沟造地
针对中国黄土高原丘陵沟壑区的特殊地貌,以景观协调、结构稳固、利用持续、功能高效为理念,以“增良田、保生态、惠民生”为主题,以现有大中型拦洪坝、淤地坝为骨架,合理配置中小型坝,“拦、蓄、排、灌”相结合,集坝系建设、旧坝修复、盐碱地改造、荒沟闲置土地开发利用和生态建设为一体的一种沟道治理新模式。
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frequency equation
frequency error
frequency estimator
frequency factor
frequency-following response
frequency four-vector
frequency fraction
frequency function
frequency histogram
frequency hopping
frequency hopping technique
frequency hypothesis
frequency hysteresis
frequency indicator
frequency instability
frequency interval
frequency inversion
frequency jitter
frequency judge approach
frequency jumping
frequency locking
frequency-locking
frequency matching
frequency measurement
frequency measuring equipment
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