查询词典 bell metal

ABSTRACT Title of Theme: Numerical Simulation and Controlling of Dimples on the Process of Multi-Point Forming for Sheet Metal Specialty: Material Processing Engineering Faculty Adviser: Prof. Cai Zhongyi Multi-point forming is a new means for sheet metal forming.

论文题目：板材多点成形中压痕的数值模拟及控制专业：材料加工工程指导老师：蔡中义教授多点成形（Multi-point forming，简称MPF）是一种全新的板材成形方式。

Based on these studies, the design and realization of software and hardware for monitoring ACD and liquid metal wave are investigated in detail, and the three reasons of liquid metal wave are given.

在此基础上，对极距和铝液波动的在线监测系统的软硬件组成及系统的应用进行了深入地研究，并提出了铝液波动的三种原因。

This device is widely used in the testing of black metal, non-ferrous metal, carbide alloy, acieration tier and chemical treatment tier, and normally used in factory workshops, labs, universities and colleges, and institution for scientific research.

该机广泛适用于黑色金属、有色金属和硬质合金及渗碳层与化学处理层的硬度测定。被广泛用于工厂车间、实验室大专院校和科研机构。

In this paper,a summarization has been made to the research developments of adhesive force between organic coating and metal substrate,and the effects of different pretreatments to metal surface.

本文介绍了有机涂层/金属基体附着力理论的研究进展，探讨了金属表面预处理对涂层附着力的重要影响，并介绍了目前国内外金属表面预处理方法的最新研究动态。

System and method for preventing formation of dendrites in metal/air fuel cell, battery or metal recovery apparatus

防止在金属/空气燃料电池，蓄电池或金属恢复设备中形成枝蔓晶的系统和方法

The shape of the cutter could be changed according to the practical situation because of the mobility of the contact points of the metal balls. And when cutting underwater, good effects were achieved because of the Mohaupt effect and airtightness of the hollow metal balls.

利用多个空心金属球之间接触的可移动性，能随时根据实际情况改变其外形；利用空心金属球的聚能效应和密封性，可以达到很好的水下爆破切割效果。

Third, most magnesium alcoholates are prepared by alcoholysis.The process is based on the exchange of alkoxide groups of a metal alcoholate in the presence of an alcohol other than the alcohol corresponding to the original alkoxide,i.e.on the alcoholysis of a metal alkoxide with a different alcohol. Primary alcoholates can be prepared by this process,such as magnesium di-n-propanolate,magnesium di-n-butanolate,magnesium di-isobutanolate.

该方法适用于较高沸点的伯醇的醇镁化合物，例如正丙醇镁、正丁醇镁、异丁醇镁等，但是用醇解法制备出的叔丁醇镁，其纯度只有80％，这是由于叔丁醇具有较大的空间位阻效应，阻碍了醇交换的进一步进行，并且叔丁醇沸点与甲醇相差不大，使得甲醇难以快速蒸出，只能得到一种混合醇盐产物。

Third, most magnesium alcoholates are prepared by alcoholysis.The process is based on the exchange of alkoxide groups of a metal alcoholate in the presence of an alcohol other than the alcohol corresponding to the original alkoxide,i.e.on the alcoho- lysis of a metal alkoxide with a different alcohol. Primary alcoholates can be prepare- d by this process,such as magnesium di-n-propanolate,magnesium di-n-butanolate,m- agnesium di-isobutanolate.

该方法适用于较高沸点的伯醇的醇镁化合物，例如正丙醇镁、正丁醇镁、异丁醇镁等，但是用醇解法制备出的叔丁醇镁，其纯度只有80％，这是由于叔丁醇具有较大的空间位阻效应，阻碍了醇交换的进一步进行，并且叔丁醇沸点与甲醇相差不大，使得甲醇难以快速蒸出，只能得到一种混合醇盐产物。

The analysis of alkali metal and heavy metal contents in the gas is made.

进行了气体中碱金属和重金属含量分析。

The bentonite can be modified by alkali metal and or alkaline earth metal compound.

所述膨润土可以用碱金属和/或碱土金属化合物进行改性。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。