A new presulfidation process of hydrotreating catalyst in the hydrogenation is introduced.介绍了一种加氢催化剂器内预硫化新工艺.Determination method of Pd content in hydrotreating catalyst by ICP - AES was established.建立了采用电感耦合等离子体发射光谱(ICP...
就在那时，我恰好环顾了下四周。It was just then that I chanced to look round.所有颜色都会褪色——尤其是在阳光直射下。All colour fades— especially under the impact of direct sunlight.有些情况下有最低年龄限制。In some cases there is a mini-mum age limit....
回顾了微尺度反应技术的发展及其在纳米材料制备中所展现的广阔前景.Microscale reaction technology was reviewed and its prospect in nanomaterials was discussed.概述了微尺度热传导理论的几种模型及其求解方法.Theoretical models of microscale heat transfer and solving approaches are...
When a woman is in labour, her cervix opens up to allow the baby to be born.当妇女分娩时, 子宫颈张开让婴儿生出来.The cervix is the flexib 1 e region between the head and prothorax.颈是头部和前胸之间可曲的区域.Here is a normal cervix with a smooth, gli...