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水土保持造林
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水土保持造林
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水土保持林草措施
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afforestation for soil and water conservation
水土保持造林
以调节地表径流,控制水土流失,保障和改善山区、丘陵区农林牧副渔等生产用地及沟壑和河川水土条件为目标的水土保持防护林构建技术。
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covariant of a tensor
covariant order
covariant principle
covariant quantization
covariant set
covariant spinor
covariant tangent bundle
covariant tensor
covariant tensor algebra
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covariant tensor fields on complex manifold
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covariant wave equations
covariate-adaptive randomization
covariate-adjusted response-adaptive randomization
covariate imbalance
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