1.1 Scope 1.1.1 This standard covers separately constructed draft hoods for installation on appliances required to be vented. A draft hood supplied as part of a listed appliance is certified as part of the appliance under the applicable provisions of t

定价： 3322元 / 折扣价： 2824 元

Addenda to American National Standard Z21.12-1990 for Draft Hoods. Approved April 23, 1993 by American National Standards Institute, Inc. NOTE: Changes, other than editorial, are denoted by a vertical line in the margin.

定价： 728元 / 折扣价： 619 元

Addenda to American National Standards Z21.12-1990 and Z21.12a-1993 for Draft Hoods. Approved February 14, 1994 by American National Standards Institute, Inc. NOTE: Changes, other than editorial, are denoted by a vertical line in the margin.

定价： 728元 / 折扣价： 619 元

1. Scope This part of ISO 4254 specifies safety requirements for winches used on forestry machinery and agricultural machinery used in forestry. It applies only to skidding winches mounted on mobile forestry machinery, e.g. skidders and forwarders a

定价： 319元 / 折扣价： 272 元

1.1 Scope This standard covers all indoor and outdoor cable terminations used on alternating-current cables having laminated or extruded insulation rated 2.5 kV through 500 kV except separable insulated connectors, which are covered by IEEE Std 386-198

定价： 683元 / 折扣价： 581 元

1.1 Scope This Particular Standard specifies requirements for the safety of INCUBATORS as defined in Sub-clause 2.1.101, hereinafter referred to as EQUIPMENT and designed to be installed and used in accordance with the Rules of the Canadian Electrical

定价： 410元 / 折扣价： 349 元

1.1 Scope This Particular Standard specifies requirements for the safety of TRANSPORT INCUBATORS as defined in Sub-clause 2.1.101, hereinafter referred to as EQUIPMENT and designed to be installed and used in accordance with the Rules of the Canadian

定价： 455元 / 折扣价： 387 元

1. Scope This clause of Part 1 is replaced as follows: 1.1 This standard applies to automatic electrical burner control systems for the automatic control of burners for oil, gas, coal or other combustibles for household and similar use including he

定价： 819元 / 折扣价： 697 元

1. Scope This clause of Part 1 is replaced as follows: 1.1 In general, this standard applies to timers and time switches for household and similar use that may use electricity, gas, oil, solid fuel, solar thermal energy, etc. or a combination there

定价： 1001元 / 折扣价： 851 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

1. Scope and Object 1.1 The limits and methods of measurement laid down in this publication apply to industrial, scientific and medical (ISM) equipment as defined in Clause 2, and to spark erosion equipment. 1.2 The assessment of conformity of equi

定价： 1047元 / 折扣价： 890 元

1. Scope This clause of Part 1 is replaced by the following: 1.1 This standard applies to the partial evaluation of thermal motor protectors as defined in Publication 730-1 for household and similar use including heating, air conditioning and simil

定价： 910元 / 折扣价： 774 元

1. Scope 1.1 This standard applies to electric motor-operated or magnetically-driven tools, intended for indoor and for outdoor use, which have all the following characteristics: (a) easily moved by one person, simple devices to facilitate transpor

定价： 2412元 / 折扣价： 2051 元