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▲.外特的▲金属材料中的稀土元索3H928钥熔炼生产工艺的完善145oAi一U合金挤压半成品在现代运抽机 结构中的应用▲,论和旅述▲直九宜升机结构材料及其国产化科研管理特点浅析自然科学墓金管理中的几个问题我国航空材料及装备环境试验研究概况 和几点建议粉末冶金复合材料的发
▲. Foreign special ▲ rare earth element in the metal material 3H928 key melting production process improvement 145oAi a U alloy extrusion semi-finished products in the application of modern pumping structure ▲, theory and travel ▲ straight nine should lift structural materials And its localization of scientific research management characteristics of the natural science tomb gold management of several issues China’s aviation materials and equipment environmental testing research overview and Suggestions Several proposals for the development of powder metallurgy composite materials