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sealing material
密封材料
填充于航空航天器零部件接缝、接头或其他结构连接处,能阻塞介质渗漏通道,起到水密性、油密性、气密性作用的材料。
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leakproofing material
密封材料
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earth observation satellite
Earth Observation System
Earth Observing System
earthometer
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Earth-orbiting probe
Earth-orbiting satellite
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Earth, Planets and Space
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earth pressure balance shield method
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