搜索 - 科创

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引用第7楼prcndssa于2011-03-27 23:30发表的 :发电厂是不是使用了并网调相装置？这个这个～电厂有个设备叫同期装置，是一面屏。正如LZ说的，以电网频率做基准，调节同步器改变汽...

引用第12楼samhrc于2011-06-25 00:35发表的 :俺的意思不是换热面积的变化，而是压差变化带来换热器流通截面变化继而造成介质流动阻力的变化。而化工生产中对阻力的变化是很敏感的。譬如...

一、前言作为一个合格的总体，应当广泛调研同类卫星的资料和设计经验。之前调研的卫星很多，但都没有详细的记述。我想，为什么不写点小文章呢，以飨读者，又也作为一个记录。今年是 KS-1Q 发射十周年。在国内...

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