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The reaction results of the selective hydrogenation of MethylAcetyleneand Propadiene in C 3 distillate by catalytic distillation were investigated with randomlypacked structure of packingtype catalyst, the combined structure of sieve tray and packingtype catalyst as well as the structure with interlaced packing and ordinary catalyst.

考察了填料状催化剂散装结构、筛板填料状催化剂复合结构、规整填料与普通催化剂交错排列结构等用于C3 馏分中丙炔、丙二烯催化蒸馏选择加氢过程的反应效果,综合考虑催化剂制备的难易、工业装置长周期运转的必要性、传质对反应的影响等因素,推荐在工业装置上采用规整填料与催化剂交错排列结

The effect of the friction moment of bearings on performance is researched. The forming mechanic and influence factors of the friction moment of ball bearing are analyzed. Suitable clearness and groove radius of ball bearings are obtained by experiment and calculation. The relationship between starting moment of ball bearing and various lubricants is analyzed. The measure for reducing the starting moment of ball bearing is put forward, it is the theory basis and reference for ball bearing design of small power unit system.The system is an unstable system when the 24-station ball pen tip production machine is running because of various interferences. It is too hard to describe the system by linear method, so the nonlinear formulation must be used.

研究了小动力头系统轴承摩擦力矩对运转性能的影响,分析了球轴承摩擦力矩的产生机理及影响因素,采用实验和计算的方法得到了动力头球轴承的合理间隙及球轴承沟曲率半径,分析了各种润滑剂与球轴承启动力矩的关系,并提出了减小轴承启动力矩的措施,为小动力头系统的轴承设计提供了理论依据及实践参考。24工位笔头加工机械在笔头的生产加工过程中,由于受到各种因素的干扰是一个不稳定系统,其稳定性会发生一定变化,而且很难用线性方法表述。

Failure phenomenon: mechanic report: a 125-type scooters (GY6 engines), it is difficult to start the engine cold, start to work within a few minutes after the operation is not smooth, but the engine JJM1 Pressure Gauge Valve thermal working well, start easily.

故障现象:修理工反映:一辆125型踏板车(GY6发动机),发动机冷态很难启动,启动后开始工作的几分钟内运转不平稳,但发动机热态工作良好、启动容易。

In the subsequent operation of the system will be extremely difficult extraction of hydrocarbons adhesion.

在随后再运转该系统时,将极难抽除粘着的碳氢化合物。

推荐网络例句

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国,慢性酒精中毒,肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题,你可以随时联系我。

Very pretty, but the airport looks more fascinating The other party wisecracked.

很漂亮,不过停机坪更迷人。那人俏皮地答道。