HFC - 245 fa ( 1,1, 1,3, 3 - pentafluoropropane ) is one of the substitute compounds for CFC, HCFC.
HFC-245fa即1,1,1,3,3-五氟丙烷 ( 1, 1,1, 3,3-pentafluoropropane ),是一种取代CFC 、 HCFC的化合物.
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The preparation of HFC - 32 by catalytic hydrogenation of CFC - 12 was explored.
探索了二氟二氯甲烷(CFC -12 )催化加氢制备HFC -32 的方法.
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HFC ( Hybrid Fiber Coax ) provides a kind of broadband access way for multimedia and broadband services.
HFC ( HybridFiberCoax ) 为多媒体和宽带业务提供了一种宽带接入方式.
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HFC ( Hybrid Fiber Coax ) access network is attached great importance because of its tremendous bandwidth and relative economy.
HFC ( HybridFiberCoax ) 接入网以其相对的经济性和巨大的带宽受到广泛重视.
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This paper introduces structure, character, main design and method of adjustment of CATV two - way HFC network.
系统介绍有线电视 双向 HFC网络 的结构 、 特点 、 设计要点与调整方法.
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In this paper , we briefly describe the state - of - the - art and future trends of the Coax ( HFC ) network.
简要论述了当前 HFC 网的技术水平和将来的发展趋势.
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However , the HFC —134 a refrigerator consumed about 4％ more electricity than the CFC —12 refrigerator.
但用HFC——134a时的耗电量约比CFC——12增加4%.
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This paper summarizes some understanding and experience of two - way HFC network design and transmission system debugging.
文章对双向HFC网络的设计和调试总结了一些粗浅的认识和经验.
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The advent of HFC network infrastructure established the bidirectional basis of CATV network.
HFC网络结构的出现为CATV网络的双向通信提供了实现基础.
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This paper describes Hunan district - country multimedia video conference system based on HFC.
主要介绍了基于宽带图象通信网的湖南省-地多媒体电视会议系统.
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Applications : XDSL , HFC , Home PNA , STB , Cable modem etc.
电缆调制解调器等通信设备中.
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By the new method, the intermolecular potential ( SW, LJ, Kihara ) parameters of HFC 125 was determined.
利用新方法拟合得到了HFC125的方阱 、 LJ ( 6, 12)及Kihara势能函数的势能参数.
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It compares the technological economy ratio and practical applicability of HFC, HDSL, ADSL and FTTC.
比较了高比特率数字用户线(HDSL) 、 不对称数字用户线(ADSL)、光纤到路边(FTTC)、光缆同轴混合网的技术经济比及实用性.
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At last, the key techniques on physical dependent layer of DS - CDMA upstream scheme are studied.
研究了HFC网络的DS-CDMA上行多址接入技术, 主要是物理层方面要解决的一些问题.
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