定价： 546元 / 折扣价： 465 元

定价： 546元 / 折扣价： 465 元

定价： 1475元 / 折扣价： 1254 元 加购物车

1 Scope and object 1.1 Scope Replace the text of this subclause by the fol/owing: Addition: This Particular Standard applies to INFANT RADIANT WARMERS as defined in 2.2.101.

定价： 774元 / 折扣价： 658 元

1. Scope 1.1 This Standard specifies the test methods to be used in measuring the energy efficiency of three-phase induction motors, in support of a consumer/user information program. The method of determining and marking the nominal efficiency valu

定价： 592元 / 折扣价： 504 元

1. Scope and Objectives 1.1 Scope This Standard applies to suspension and dead-end composite insulators used on ac overhead transmission lines with a nominal voltage 69 kV or greater and a frequency not greater than 100 Hz. 1.2 Objectives The

定价： 592元 / 折扣价： 504 元

This PDF includes GI 2. 1. Scope 1.1 This Standard provides methods for rating factory-made commercial and industrial unitary air conditioners, heat pumps, and condensing units of the types classified in Tables 1, 2, and 3 and intended for air-cond

定价： 455元 / 折扣价： 387 元

This PDF includes GI 2. 1. Scope 1.1 This Standard applies to commercial refrigerator, refr igerator-freezer cabinets that are intended for storing and holding food products and other perishable merchandise. 1.2 This Standard applies to (a) man

定价： 501元 / 折扣价： 426 元

1.1 Scope This International Standard states the requirements for both self-healing and non-self-healing continuously rated a.c. capacitors of up to and including 2.5 kvar, and not less than 0.1 μF, having a rated voltage not exceeding 1 000 V, which a

定价： 910元 / 折扣价： 774 元

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 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

1. Scope This International Standard specifies general safety requirements for specially designed self-propelled forestry mac hines defined in ISO 6814:1983, clause 4, and machines adapted for forestry applications when operating on work sites or trans

定价： 455元 / 折扣价： 387 元