Moreover, corundum and periclase have not been detected in space dust before.
而且，此前在太空尘埃中还未侦测到刚玉和方镁石。
The anti-penetration characteristics of several kinds of steel fiber reinforced concrete (SFRC) with tightly arrayed corundum spheres to long rod projectile have been experimentally studied.
利用长杆侵彻弹对几种含密排刚玉球层的钢纤维混凝土靶体进行了抗侵彻试验研究。
Under the condition of applying scale test of UNITANK process, rubber film aerator and campanulate corundum aerator have been investigated.
在生产性试验条件下，考察了橡胶膜片曝气器与钟罩式刚玉曝气器在UNITANK工艺中的实际应用情况。
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