M41 通信用电源设备 标准查询与下载

YD 576-1992 通信用半导体整流设备

Semiconductor rectifier equipments For telecommunications

STAS 13038-1991 兽毛皮．农场鼬皮

1 Prezentul standard se refer? la pieile brute de dihori de cresc?torie ?i se aplic? de la recoltarea acestora p?n? la predarea c?tre unit??ile de prelucrare. Pieile brute de dihori s?nt denumite prescurtat tn cuprinsul standardului piei. 2 La predarea c?

Fur animal skins. Farm polecat skins

STAS 13037-1991 兽皮皮毛．饲养北极狐毛皮

1 Prezentul standard se refer? la pieile brute de vulpi polare de cresc?torie ?i se aplic? de la recoltarea acestora p?n? la predarea c?tre unit??ile de prelucrare. 2 La predarea c?tre unit??ile de prelucrare, pieile de vulpi polare trebuie s? fie conser

Fur animal skins farmpolar fox skins

ITU-R M.542-1-1982 通过便携式无线电话设备的船上通信.第8C部分-海上移动服务.电讯及相关学科

that common channels for on-board communications are necessary to meet world-wide re.quirements

(WITHDRAWN) On-Board Communications by Means of Portable Radiotelephone Equipment - Section 8C - Maritime Mobile Service; Telephony and Related Subjects

YDJ 1-1989 邮电通信电源设备安装设计规范

Specification for installation design of posts and communications power supply equipment

YDB 071.4-2011 通信电源和机房环境节能技术指南 第4部分：空调能效分级

Technical Guidelines for Energy Conservation of Communication Power Supply and Computer Room Environment Part 4: Air Conditioning Energy Efficiency Classification

YD/T 799-1996 通信用阀控式密封铅酸蓄电池技术要求和检验方法

本标准规定了通信用阀控式密封铅酸蓄电池技术要求、检测项目和检验方法。 本标准适用于生产企业、使用单位和质量监督部门对产品质量的检验。

Technical requirements and inspection methods for valve-regulated sealed lead-acid batteries for communication

YDB 071.1-2011 通信电源和机房环境节能技术指南 第1部分：总则

本部分规定了通信 能原则、通信电源节能要求、空调节能 要求和通信机房环境节能

Technical Guidelines for Energy Conservation of Communication Power Supply and Computer Room Environment Part 1: General Principles

YDJ 31-1983 通信电源设备安装工程施工及验收技术规范

Technical specifications for Installation engineering construction and acceptance of communication power supply equipment

YDB 071.3-2011 通信电源和机房环境节能技术指南 第3部分：电源设备能效分级

Technical Guidelines for Energy Conservation of Communication Power Supply and Computer Room Environment Part 3: Energy Efficiency Classification of Power Supply Equipment

YDB 071.2-2012 通信电源和机房环境节能技术指南 第2部分：应用条件

Technical Guidelines for Energy Conservation of Communication Power Supply and Computer Room Environment Part 2: Application Conditions

YD/T 731-1994 通信用高频开关整流器

High frequency switching rectifier for communication