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聚氨酯推进剂
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聚氨酯推进剂
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polyurethane propellant
聚氨酯推进剂
以聚氨酯为黏合剂,高氯酸铵等为氧化剂,加入能量添加剂、固化剂和键合剂等,经混合、浇注、固化成形的复合推进剂。
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saltwater crocodile
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salt water-fried
saltwater lakes in China
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Salt well and Salt pan Site at Mangkang
Salt Wells of Zigong
Saltykov-Shchedrin Public Library
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salty taste in the mouth
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