1. Scope This Standard applies to track systems with two or more poles for the connection of luminaires to the electrical supply, either of rated voltage not exceeding 300 V between poles, 150 Volts-to-ground with the provision for earthing (Class I) a

定价： 546元 / 折扣价： 465 元

1. Scope and Object 1.1 This International Standard is applicable to thermal-links, intended for incorporation in electrical appliances, electronic equipment and component parts thereof, normally intended for use indoors, in order to protect them agai

定价： 819元 / 折扣价： 697 元

定价： 229元

1. Scope 1.1 This standard applies to the following electronic flash apparatus for photographic purposes, having a stored energy not exceeding 2 000 J, together with associated apparatus and not intended to be subjected to dripping or splashing: - a

定价： 1456元 / 折扣价： 1238 元

CSA Preface This is the first edition of CAN/CSA-Z15190, Medical laboratories - Requirements for safety, which is an adoption, with Canadian deviations, of the identically titled ISO (International Organization for Standardization) Standard 15190 (firs

定价： 1183元 / 折扣价： 1006 元

定价： 798元

定价： 640元

定价： 862元

1. Scope and Object 1.1 Scope This standard is applicable to stationary or portable, single- phase or polyphase, air-cooled isolating and safety isolating transformers, associated or otherwise, having a rated supply voltage not exceeding 1000 V alt

定价： 2184元 / 折扣价： 1857 元

This PDF includes Update No. 1 1 Scope This International Standard specifies requirements for quality and competence particular to medical laboratories.

定价： 1138元 / 折扣价： 968 元

1 Scope This International Standard specifies requirements for the dimensions, basic properties and method of size designation of the most commonly used types of oro-tracheal and naso-tracheal tube made of plastics materials and/or rubber (plain and cu

定价： 865元 / 折扣价： 736 元

1 Scope This International Standard specifies requirements for suction catheters made of plastic materials and intended for use in suction of the respiratory tract. Specialized suction catheters, e.g. those with more than one lumen, are excluded fro

定价： 455元 / 折扣价： 387 元

1. Scope This standard applies to zinc-coated steel wires used in the construction and/or reinforcement of conductors for overhead power transmission purposes. It is intended to cover all wires used in constructions where the individual wire diameters,

定价： 455元 / 折扣价： 387 元

1. Scope This part of IEC 79 prescribes the specific requirements for construction and testing of electrical apparatus, parts of electrical apparatus and Ex components which have rated voltages not exceeding 11 kV with the type of protection encapsulat

定价： 1092元 / 折扣价： 929 元

1. Scope and Object This standard applies, when required by the relevant product standard, to switchgear and controlgear hereinafter referred to as "equipment" and intended to be connected to circuits, the rated voltage of which does not exceed 1000 V

定价： 2321元 / 折扣价： 1973 元