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field road project
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field road project
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农学
田间道路工程
释
field road project
田间道路工程
为满足农业物资运输、农业耕作和其他农业生产活动,构建田块间及田块与居民点间道路体系的活动。
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rare earth metal ore deposit
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rare earth oxidation-reduction separation and purification
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rare earth permanent magnetic material
rare earth permanent magnetic materials
rare earth permanent magnetic material with low temperature coefficient
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rare element
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