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成型是
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  is shaped
     Spiral coil pipe is shaped by means of utilizing the effect of intermediate frequency induction in order to quickly heat the limited area of a steel pipe,making the heated pipe within its plastic deformation range follow the preset track at a definite speed.
     螺旋盘管的成型是利用中频感应效应使管子在小区域内快速加热,被加热的管子在其塑性变形范围内,按预先设定的轨道以一定的速度向前推进达到成型。
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  “成型是”译为未确定词的双语例句
     With wet or colloidal processing method, ceramics can be produced with high reliability and complicated shapes, which have the advantages of easy control of agglomeration, impurities, and the defects.
     湿法及胶态成型是制备高可靠性、复杂形状陶瓷的有效方法,它具有容易控制坯体的团聚及杂质,减少坯体的缺陷,并可制备出各种形状复杂的陶瓷部件等许多优点。
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     Laser direct deposition of metallic components is a combining technology of CAD/CAM, high power laser, and rapid prototyping.
     金属零件的激光快速成型是结合CAD/CAM、高功率激光熔覆和快速原型制造的先进技术。
     Laser direct deposition of metallic components is a combining technology of CAD/CAM, high power laser, and rapid prototyping.
     金属零件的激光快速成型是结合CAD/CAM、高功率激光熔覆和快速原型制造的先进技术。
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     Injection molding is one of the important methods for polymer processing.
     注射成型是聚合物加工成型的重要方法之一。
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     The Fused Deposition Modeling (FDM) is one of the Rapid Prototyping typical technologies. FDM refers to mechanics, CNC, macromolecule material and computer software technologies.
     熔丝沉积(Fused Deposition Modeling ,FDM)快速成型是快速成型技术中一种典型的成型方法,熔丝沉积快速成型法涉及到机械、数控、高分子材料和计算机等技术。
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     (b) sheet matal forming;
     板材成型;
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     A STUDY ON AIR INJECTION MOLDING
     气体注射成型
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  is shaped
The article discusses a flat bearing with a gas lubricant, one of whose surfaces is shaped by inclined grooves and vibrates in accordance with a given harmonic law with a high frequency.
      
Recent studies established that the specificity of phytoimmunity is shaped at the initial stages of genic interactions between a pathogen and its plant host.
      
The edges of the tip (which is shaped into a polyhedron) are found to consist of monatomic steps about 1 nm wide and about 100 nm long.
      
Fathers behavior towards sons is shaped by similarity ("the son as a mirror"), whereas fathers interact with daughters in a way that work out differences and support feminity.
      
I posit that corporate social responsibility (CSR) is a field of action that is shaped through the interplay of popular pressures and the response of corporations to such pressures thereof.
      
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The possibility of using granular nitrided fused iron catalyst for Fischer-Tropsch synthesis at high space velocities is investigated. It is observed that the activity of granular catalyst decreases seriously with time when used at low reaction temperatures,while the use of relatively high reaction temperatures stimulates carbon formation on the catalyst,resulting in the clogging up of the reactor.These phenomena differ from what occurs on a powdered catalyst. The effect of the operating variables and methods...

The possibility of using granular nitrided fused iron catalyst for Fischer-Tropsch synthesis at high space velocities is investigated. It is observed that the activity of granular catalyst decreases seriously with time when used at low reaction temperatures,while the use of relatively high reaction temperatures stimulates carbon formation on the catalyst,resulting in the clogging up of the reactor.These phenomena differ from what occurs on a powdered catalyst. The effect of the operating variables and methods of preparation of granules on the durability of catalyst are thoroughly studied.It is evident that the decrease of the catalyst activity are mainly due to the gradual plugging up of the pore volume of the catalyst by the high-boiling-point products.This conclusion is supported by the argument that diffusion within the pores steps in as the rate-controlling step during the course of synthesis.It is pointed out that the durability of granular fused iron catalyst may be considerably improved through the use of a catalyst of more porous structure.

为进行高速固定床以水煤气为原料的合成,研究了颗粒熔铁催化剂.发现随颗粒加大,在低温和压力下合成时活性无法维持;在高温合成时,则又发现生炭粉碎而很快使床层堵塞.为了使催化剂维持足够的寿命,设法消除低温合成过程中的障碍是重要研究方向之一.试验了温度、压力、空速、再生方法和不同催化剂组成及不同成型方法等对活性维持的影响,认为:在高空速下,氮化熔铁颗粒催化剂活性随时间下降主要是由于生成的重质产物堵塞了颗粒孔隙所引起;在颗粒孔隙堵塞同时,反应速度控制步骤由原为化学反应速度控制转为内扩散控制的慢反应.从而指明,解决熔铁剂活性维持问题的关键在于改善孔隙结构.

MgO-Al_2O_3-TiO_2 MgAl_2O_4 c Mg_2TiO_4 Al_2TiO_5 c MgTi_2O_5 MgAl_2O_4 u Al_2TiO_5MgAlO_4-Al_2TiO_5 MgAl_2O_4-Al_2TiO_5-MgTi_2O_5-Mg_2TiO_4.

用固相反应方法研究了MgO-Al_2O_3-TiO_2体系的物相关系,发现此体系除MgAl_2O_4与Mg_2TiO_4形成尖晶石型连续固溶体,以及Al_2TiO_5与MgTi_2O_5形成型连续固溶体以外,MgAl_2O_4与Al_2TiO_5也彼此部分地互溶而形成不连续的固溶体。此体系中不存在三元化合物。 还测定了MgAl_2O_4-Al_2TiO_5固溶体的点阵常数与浓度之间的直线关系。用等a_o线表示了MgAl_2O_4-Al_2TiO_5-MgTi_2O_5-Mg_2TiO_4区域尖晶石点阵常数的变化。

In the previous paper,we have mentioned that the activity of the granular catalysts for hydrocarbon synthesis decreases with time during the reaction carried out at lower temperature and higher space velocity.This was resulted,as we observed,from plugging up of the pore volumes of the catalyst by the high-boiling syntheic products,and the reaction controlling step changes from the kinetic one into an internal diffusion process thereafter.Therefore,it is reasonable to infer that by using the catalyst of proper...

In the previous paper,we have mentioned that the activity of the granular catalysts for hydrocarbon synthesis decreases with time during the reaction carried out at lower temperature and higher space velocity.This was resulted,as we observed,from plugging up of the pore volumes of the catalyst by the high-boiling syntheic products,and the reaction controlling step changes from the kinetic one into an internal diffusion process thereafter.Therefore,it is reasonable to infer that by using the catalyst of proper macro-pore structures enables one to prolong the time for plug- ging up the catalyst pores,and a high durability of catalytic activity may be expected. This paper discussed mainly the different ways for preparation of the suitable macro-pore granular catalysts such as particle,pelleted,cemented,sintered and enveloped catalyst,and the results of their durabilities tests were given.For a granular catalyst,the porosity of macro-pores and the mechanical strength are usually contradicted with each other.Among those methods mentioned above,only sintered and enveloped catalysts could meet the requirements both in mechanical strength and porosity.It was also shown in our tests that those catalysts having more porous struc- tures proved to be much better result in durability of catalytic activities,such as using sintered granular catalyst of 362-type fused iron catalyst for Fischer-Tropsh synthesis at 15 atm.,240—250° and with space velocity of 500(hr)~(-1),a 85% CO conversion obtained for 40 days duration with or without catalyst regeneration by solvent extraction.These results suggested the possibility of the application of granular fused iron catalyst for high space velocities synthesis in fixed bed.

前报指出:应用氮化熔铁颗粒催化剂在高空速下进行合成时,由于重质产物堵塞了颗粒孔隙,反应由原为表面化学反应控制转为内扩散控制的慢反应,因而产生了活性随时间而下降的现象.改变催化剂的孔隙结构,延缓重质产品堵塞孔隙的时间,是解决活性维持的方向之一.本文着重讨论了关于催化剂成型方法的研究结果.如欲增大颗粒催化剂的孔隙率,往往与强度发生矛盾.在详细研究了影响强度与孔隙的关系后指出:在所试验的五种成型方法中(大颗粒,粘合,压片,烧结及包饀),烧结及包饀两种方法能同时满足强度与孔隙的要求.试验证明:由成型方法所构成的大孔,减轻了重质产品的堵塞作用,从而有效地延缓了活性下降的时间,在无回流操作下,应用362型催化剂,在15气压,240-250°,空速500时~(-1)结合油洗再生,顺利进行了40日以上的寿命试验.因而对于熔铁催化剂用于高速固定床的问题获得初步结果,提出了它应用的可能性.

 
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