The aims of this paper were to prepare polymer damping materials with wide temperature range and the designation of constrained damping structure.
论文围绕宽温域高分子阻尼材料的制备、约束阻尼结构的设计展开研究。
2
The Ilyushin Il-76 (NATO designation Candid) was fielded by the Soviet Air Force in 1974 as a medium range, medium payload, rough surface capable cargo aircraft.