The elements which affected the ablative properties of silicone rubber heat shields were discussed.探讨了影响硅橡胶热防护材料烧蚀性能的因素.The effects of filler fiber and flame retardant on ablative performance of EPDM insulation are studi...
A supernova sprays space with many different elements.超新星会向宇宙放射不同种类的元素。At least one supernova occurs per decade in our galaxy.在我们的星系中每 10 年至少有一颗超新星出现。The ejected mass then probably becomes the observed material of a supe...