The grain size and embedded features are related to the origin of ore dePOsits.
银矿物的粒度与嵌布特征与矿床成因有密切关系；
According to the thermal shielding model of solid rocket motor, an approach of ablation heat shield design of end-burning grain with embedded wire was put forward in this paper.
根据固体火箭发动机绝热防护模型，提出了一种嵌金属丝端燃装药绝热层设计方法。
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