excelent中文什么意思

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1. Yet , most existing high speed on / off valves use electromagnet as their electicity - mechanism conversion element , and good performant electromagnets have to be imported from other countries , in such situation , it is difficity to make excelent high speed electromagnet valve made in our country , even if we can make good performant high speed electromagnet valve in our country , it still has the shortcoming of not high enough respond speed , too small placket and big volumeo in this thesis , a new high speed on / off valve is developed based on two types of existing valves , this new valve has higher respond speed , a little big placket and little volume o for the new valve , several main task was made out as below : a ) several types of high speed on / off were first analyzed , then the basic performance of the actuator of the new valve was analyzed
   高速开关阀是20世纪80年代发展起来的一种具有响应速度快、抗污染能力强、与电子电路配合好等特点的一个良好的动力放大元件。但是现有的高速开关阀基本上采用电磁铁为电?机转换元件，高性能的电磁铁又基本为进口，难以满足高性能高速开关阀国产化的要求，即使是高性能的电磁铁式高速开关阀，仍存在着响应速度不够大、开口过小、体积较大的缺点。本文在现有两种高速开关阀的基础上，设计了一种新颖的高速开关阀，在提高其动态性能的同时，增大了阀的开口，减小了阀的体积。