primary medullary ray原生芒髓;初生髓线

primary cosmic ray[高能] 初级宇宙线;[高能] 初级宇宙射线

primary -ray初始γ射线

primary cosmic ray energy spectrum初级宇宙线能谱

composition of primary cosmic ray一次宇宙线的组成

primary X-ray beam原X射线束

heavy metal ion primary ray重初级射线

identification of primary cosmic-ray component原初宇宙线分辨

heavy cosmic ray primary宇宙线重原始粒子