private branch exchange (PBX)是什么意思

网络释义

用法例句

A Special Communication Software Design on Vc++;

基于Vc++的专用通信软件设计

As computer has stepped into daily life in depth,people will not use special net and public net limitedly,but also take full advantage of Internet technology to build their own inner net.

随着计算机网络日益深入人们的日常生活和工作,人们已经不仅仅局限于独立地使用内部专用网络和公共互联网络,而是要利用Internet技术建立自己的内部网。

Depending on telecommunication networks,enterprise special communication network may utilize the state policy to encourage contest in communication field,find new investing form,and gain new development.

企业专用通信依托现有的电信网络 ,充分利用国家鼓励电信竞争的产业政策 ,寻求灵活的融资方式 ,在电信竞争中必将有大的发

Base on the production of SG-7 resin, not only the commercial formulation and process parameters of 30 m3 polymerizer were adjusted for special resin of injection pipe, but also the formula weight control, ?°fish eyes?± reduction, particle shape optimization, and heating ageing were improved.

介绍了以生产SG-7型PVC树脂为基础,在30m3聚合釜上,通过对生产配方与工艺参数的调整,解决分子量控制、降低鱼眼、颗粒形态优化和提高热老化性等方面问题,开发出塑化性能好,具有较好流变性和耐热性,适于PVC注塑管件加工的专用树脂。

The classification and main properties of the BOPP for cigarette packing film are briefly described in this paper,Simultaneously,the pre- sent situation of the special resin and functional masterbatch is introduced.

简述了 BOPP 烟膜的分类和主要控制性能，介绍了 BOPP 烟膜专用树脂及主要 添加的功能母料的应用现状。

It is becoming more and more important to apply and develop high quality PEspecial resin for tubings.

高档聚乙烯管材专用树脂的应用和开发愈来愈受到广泛的重视。

Preparation of special materials for transparent flexible reinforced PVC pipes;

聚氯乙烯透明增强软管专用料的研制

Research on PC/ABS Special Material for Auto by Orthogonal Experimental Design;

正交试验法研究PC/ABS汽车专用料

Detailly described the production, developing and product utilizing of the special materials for the polyethelene pipe domestic and aboard, and put forward the developing trend of our special polyetheline pipe material used in China according to the present marketing requirement and develop- ing in the future.

详细论述了国内外聚乙烯管材专用料的生产、开发及产品使用的发展状况,并根据目前国内的市场需求及未来的发展,提出我国聚乙烯管材专用料的开发方向。