1. Scope 1.1 This Standard covers single-phase, ac electrical installations not exceeding 250 V between conductors or 150 V to ground, on boats which may have an on-board source of electrical supply or may be connected to a source of ac electrical sup

定价： 455元 / 折扣价： 387 元

1. Scope 1.1 This Standard covers the dc electrical installations not exceeding 50 V between conductors on boats. 1.2 This Standard applies to boats that are not required to be certificated by the Department of Transport. 1.3 The requirements o

定价： 455元 / 折扣价： 387 元

定价： 1138元 / 折扣价： 968 元

1. Scope This section of the guide describes the tasks required for planning of maintenance and maintenance support. They should be performed during the system acquisition phase in order to meet the availability objectives in the operational phase. The

定价： 1092元 / 折扣价： 929 元

定价： 2184元 / 折扣价： 1857 元

定价： 774元 / 折扣价： 658 元

CSA Preface This is the second edition of CAN/CSA-ISO 14004, Environmental management systems - General guidelines on principles, systems and support techniques, which is an adoption without modification of the identically titled ISO (International Org

定价： 1092元 / 折扣价： 929 元

1. Scope 1.1 This Standard describes the design, construction, load rating, installation, erection, inspection, maintenance, repair, modification, test, and operation of lattice and telescopic boom mobile cranes. 1.2 This Standard applies only to m

定价： 546元 / 折扣价： 465 元

1 Scope This part of IEC 61000 defines test methods for immunity to ripple at the d.c. input power port of electrical or electronic equipment. This standard is applicable to low-voltage d.c. power ports of equipment supplied by external rectifier syst

定价： 546元 / 折扣价： 465 元

定价： 1365元 / 折扣价： 1161 元

1. Purpose and Scope The purpose of this Guideline is to (a) assist users of footwear and their employers in the proper selection of the best footwear protection available for their particular working environment and specific job functions; (b) assist

定价： 137元 / 折扣价： 117 元

1. Scope 1.1 This Guideline considers the agents and mechanisms related to durability and provides advice for incorporating requirements for durability into the design, operation, and maintenance provisions for buildings and their components. 1.2 T

定价： 774元 / 折扣价： 658 元

1. Scope This part of ISO 9241 provides guidelines to users of VDT-based information processing systems with reference to office tasks. This guidance is relevant to both the organization implementing the system and the people using the equipment. The

定价： 273元 / 折扣价： 233 元