1. Scope This clause of Part 1 is replaced as follows: 1.1 This standard applies to automatic electrical pressure sensing controls with a minimum gauge pressure rating of -60 kPa and a maximum gauge pressure rating of 4,2 MPa, for use in, on or in

定价： 1001元 / 折扣价： 851 元

FOREWORD This amendment has been prepared by IEC technical committee 72: Automatic controls for household use. AVANT-PROPOS Le présent amendement a ete etabli par le comite d.etudes 72 de la CEI: Commandes automatiques pour appareils domestiques.

定价： 410元 / 折扣价： 349 元

FOREWORD This amendment has been prepared by IEC technical committee 72: Automatic controls for household use. AVANT-PROPOS Le présent amendement a été établi par le comité d'études 72 de la CEI: Commandes automatiques pour appareils domestiques.

定价： 182元 / 折扣价： 155 元

定价： 2867元 / 折扣价： 2437 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

1. Scope This standard covers ballasts, excluding resistance types, for use on a.c. supplies up to 1 000 V at 50 Hz or 60 Hz, associated with tubular fluorescent lamps with or without pre-heated cathodes operated with or without a starter or starting d

定价： 1456元 / 折扣价： 1238 元

1. Scope This standard specifies safety requirements for ballasts for discharge lamps such as high-pressure mercury vapour, low- pressure sodium vapour, high-pressure sodium vapour and metal halide lamps. Section One specifies general requirements and

定价： 910元 / 折扣价： 774 元

1. Scope This Standard applies to cast aluminium alloy enclosures pressurized with dry air, inert gases, eg. sulphur hexafluoride, carbon tetrafluoride, or nitrogen or a mixture of such gases, used in indoor or outdoor installations of high-voltage swi

定价： 728元 / 折扣价： 619 元

2. Scope and Field of Application 2.1 Type of Equipment This Standard applies to fusion welded wrought aluminium and alu minium alloy enclosures pressurized with dry air, inert gases, eg, sulphur hexafluoride, carbon tetrafluoride, or nitrogen or a m

定价： 1274元 / 折扣价： 1083 元

2. Scope and Field of Application 2.1 Type of Equipment This Standard applies to fusion welded wrought steel enclosures pressurized with dry air, inert gases, eg, sulphur hexafluoride, carbon tetrafluoride, or nitrogen or a mixture of such gases, use

定价： 1274元 / 折扣价： 1083 元

1. Scope 1.1 This standard applies to electrically heated flexible appliances designed for the application of heat to a bed, or to the human body, such as blankets, pads and mattresses for household purposes, and to control units delivered with them.

定价： 2184元 / 折扣价： 1857 元

2. Scope and Field of Application 2.1 Type of Equipment This Standard applies to welded composite enclosures of cast and wrought aluminium and aluminium alloy enclosures pressurized with dry air, inert gases, eg, sulphur hexafluoride, carbon tetraflu

定价： 910元 / 折扣价： 774 元

1. Scope This standard specifies the safety and interchangeability requirements, together with the test methods and conditions, required to show compliance of tubular fluorescent and other gas-discharge lamps with integrated means for controlling start

定价： 1047元 / 折扣价： 890 元

2. Scope 2.1 Type of Equipment This standard applies to cast resin partitions pressurized with inert gases, eg, sulphur hexafluoride, carbon tetrafluoride, or a mixture of such gases, such as sulphur hexafluoride and nitrogen used in indoor and outdo

定价： 455元 / 折扣价： 387 元

1.1 This International Standard specifies requirements for pressure regulators and pressure regulators with flow-metering devices intended for the administration of medical gases in the treatment, management, diagnostic evaluation and care of patients. It

定价： 728元 / 折扣价： 619 元