着重评介了铝镍钴系永磁材料 、 铁氧体永磁材料 、 稀土永磁材料和粘结永磁材料四大系列.Emphatically reviewed four systems of permanent magnet material : Al - Ni - Co magnet, ferrite magnet, rare - magnet and glue magnet.特殊工业陶瓷、磁性材料及制品, 包括氧化锆 、 氧化铝材料制作的机械件, 钕铁硼、铝镍...
The abdominal aorta is normally smaller than the thoracic aorta.腹主动脉一般比胸主动脉小.Sudden deceleration may also result in shearing injury to the intima of the aorta.突然减速也可能造成主动脉内膜的剪式裂伤.The aortic valve is found between the lef...
One after the other Danton, Robespierre and the rest went to the guillotine.丹东、罗伯斯比尔以及其他人被逐一送上了断头台。At the same time Danton was a jovial family man.(但)与此同时,丹东又是一位快乐的居家男人.He is Napoleon's stay and Danton's resour...
有一颗小行星可能会与地球发生碰撞。There is an asteroid on a collision course with the Earth.小行星, 亦称为 “ 小型行星 ”, 在外太空中不计其数.Asteroids, also known as " minor planets ", are numerous in the outer space.最大的小行星是谷神星,体积约为月球的1/4.The largest astero...