Cyclic tests of semirigid end - plate connections in multi - story steel frames 多层钢框架半刚性端板连接的循环荷载试验研究
4.
Any of various light , porous , semirigid or spongy materials used for thermal insulation or shock absorption , as in packaging 海绵如打包时用于隔热或吸震的轻质蜂状半硬性或海绵状材料。