【摘 要】
：
上海无线电二厂和上海无线电三厂协同合作,最近试制成功JBE-1型400兆赫便携式无线电话机,经过有关部门测试鉴定和实际使用证明,性能良好,符合设计要求,主要技术指标达到国外
论文部分内容阅读
上海无线电二厂和上海无线电三厂协同合作,最近试制成功JBE-1型400兆赫便携式无线电话机,经过有关部门测试鉴定和实际使用证明,性能良好,符合设计要求,主要技术指标达到国外同类产品的水平.JBE-1型无线电话机具有体积小、重量轻、电波复盖连续性能好、外界干扰影响小等特点.全机由无线电话机、手持送受话器和鞭状天线三个部分组成.工
Shanghai No.2 Radio Factory and Shanghai No.3 Radio Factory cooperated with each other. Recently, the trial production of JBE-1 400 MHz portable radiotelephone has been successfully completed. It has passed the testing, identification and actual use certification of the relevant departments and has good performance and meets the design requirements. The main technical indexes have reached the same kind of foreign products Level.JBE-1 radiotelephone has the characteristics of small size, light weight, continuous coverage of radio waves and little influence of outside interference, etc. The whole machine is composed of three parts: radiotelephone, handset and whip antenna. work
其他文献
Emotion appears to be a key link between mental states and physical disease (Lane et al., 2009).In this frame, the neuro-somatic approach to mind-body inter
在空域监视过程中,有时希望对目标进行分类。在某种程度上,目标的分类,一般可以根据经典的雷达测量方法所测得的飞行轨迹来实现。下面介绍一种可以测量单个目标雷达横截面侧
BACKGROUND AND PURPOSE: dowuregulation of the tumor suppressor, phosphatase and (tla)sin homolog deleted on chromosome 10 (PTEN), is thought to be a novel n
Clinical Application of Advanced CNS Tumor MR Imaging including MR Spectroscopy, MR Contrast Perfusion, MR BOLD Functional Imaging and Diffusion Tensor Fibe
Inhibition of brain energy metabolism is one of key featues of Alzheimers disease and other cholinergic encephalopathies.However, mechanisms of preferential
In order to understand healthy and pathological human brain development and function, we also have to better understand the underlying brain networks and br
Alteration in tissue pH is an indicator of many pathological processes.In tumors, the pH gradient exists between the intracellular (pHi) and extracellular (
We have previously reported that infection of mice with Theilers routine encephalomyelitis virus (TMEV) induces vigorous IL-6 production in glial and dendri
阳光、空气和水,是世间万物的生命之源,是生神。然而,随着现代人类社会的发展,生神却受到前所未有的有力挑战,这个挑战者就是:污染！！！污染造成自然力的衰退！污染造成物种的退化
刘琦怎么成了上海人?这里有着一段动人的故事。——1981年4月1日下午在那场煤气罐爆炸的烈火中,兰州军区的青年军人刘琦为了抢救战友的孩子,被严重烧伤:眼睛烧瞎了,嘴巴烧裂