定价： 2412元 / 折扣价： 2051 元

This PDF includes Technical Corrigendum 1:1995 1 Scope This part of IS0 730 specifies the dimensions and requirements of the three-point linkage for the attachment of implements or equipment to the rear of agricultural wheeled tractors. It specifi

定价： 592元 / 折扣价： 504 元

This PDF includes Update #2 1. Scope 1.1 This Standard applies to electric clothes washing machines and extractors intended to be used in nonhazardous locations in accordance with the Canadian Electrical Code, Part I (CEC), and the (U.S.) National

定价： 1775元 / 折扣价： 1509 元

定价： 3049元 / 折扣价： 2592 元

定价： 683元 / 折扣价： 581 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 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 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 specifies general and safety requirements for starting devices (starters and ignitors) for tubular fluorescent and other discharge lamps for use on a.c. supplies up to 1 000 V at 50 Hz or 60 Hz which produce starting pulses not g

定价： 910元 / 折扣价： 774 元

1. Scope This standard specifies general and safety requirements for electronic ballasts for use on a.c. supplies up to 1000 V at 50 Hz or 60 Hz with operating frequencies deviating from the supply frequency, associated with tubular fluorescent lamps a

定价： 1047元 / 折扣价： 890 元

This PDF includes Update #2 1. Scope 1.1 These requirements cover permanently installed devices, hereafter referred to as dimmers, that employ a dimming function intended for control of lighting loads of the ballast, transformer, or tungsten-filame

定价： 1775元 / 折扣价： 1509 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

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

1. Scope 1.1 Application of Requirements This Standard specifies minimum requirements for the design, construction, installation, and operation of elevating devices that are to be used by persons with physical disabilities travelling between fixed po

定价： 501元 / 折扣价： 426 元