定价： 2048元 / 折扣价： 1741 元

3.1 This guide defines the shelf life of carbon black when stored under proper conditions.1.1 This guide defines the shelf life of carbon black.1.2 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 515元 / 折扣价： 438 元 加购物车

1.1 This specification pertains to fixed wing transport units involved in patient transportation and care, at the advanced life support level. It outlines the minimum requirements, including personnel and the patient care equipment, that must be met before the unit can be classified as an advanced life support transport unit.1.2 This specification describes the minimum configuration and capability required for the vehicle, the minimum number of seats for personnel, and the provisions for the minimum medical equipment and supplies.1.3 Other specifications of Committee F-30 will apply.

定价： 0元 / 折扣价： 0 元

1. Scope 1.1 General This Guideline provides a method for conducting environmental life cycle analysis and assessment. It guides industry formulation of product life cycle process stages, stage screening and problem definition, inventory analysis, an

定价： 865元 / 折扣价： 736 元

4.1 The test results provide an indication of the motor life of an electric motorized nozzle. The end of motor life will be judged in accordance with Section 3.1.1 This test method covers the motorized nozzle used in household or commercial central vacuum cleaning systems.1.2 This test method provides a test for determining operating motor life in hours by an accelerated laboratory procedure. The motors are tested while mounted and operated in the motorized nozzle.1.3 This test method covers only the motorized nozzle. The system used to provide the airflow source is not under consideration.1.4 This test method is limited to the determination of motor life for an electrically powered household or commercial motorized nozzle.1.5 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车

4.1 Strain gages are the most widely used devices for measuring strains and for evaluating stresses in structures. In many applications there are often cyclic loads that can cause strain gage failure. Performance characteristics of strain gages are affected by both the materials from which they are made and their geometric design.4.2 The determination of most strain gage performance characteristics requires mechanical testing that is destructive. Since strain gages tested for fatigue life cannot be used again, it is necessary to treat data statistically. In general, longer and wider strain gages with lower resistances will have greater fatigue life. Optional additions to strain gages (integral lead wires are an example) will often reduce fatigue life.4.3 To be used, strain gages must be bonded to a structure. Good results, particularly in a fatigue environment, depend heavily on the materials used to clean the bonding surface, to bond the strain gage, and to provide a protective coating. Skill of the installer is another major factor in success. Finally, instrumentation systems shall be carefully selected and calibrated to ensure that they do not unduly degrade the performance of the strain gages.4.4 Fatigue failure of a strain gage often does not involve visible cracking or fracture of the strain gage, but merely sufficient zero shift to compromise the accuracy of the strain gage output for static strain components.1.1 This test method covers a uniform procedure for the determination of strain gage fatigue life at ambient temperature. A suggested testing equipment design is included.1.2 This test method does not apply to force transducers or extensometers that use metallic bonded resistance strain gages as sensing elements.1.3 Strain gages are part of a complex system that includes structure, adhesive, strain gage, lead wires, instrumentation, and (often) environmental protection. As a result, many things affect the performance of strain gages, including user technique. A further complication is that strain gages, once installed, normally cannot be reinstalled in another location. Therefore, it is not possible to calibrate individual strain gages; performance characteristics are normally presented on a statistical basis.1.4 This test method encompasses only fully reversed stain cycles.1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车

1. Scope 1.1 This Standard provides a general introduction to the concept of life cycle costing. Although life cycle costs c onsist of many contributing elements, this Standard particularly highlights the costs associated with dependability elements

定价： 319元 / 折扣价： 272 元

1 Scope This Technical Report provides examples to illustrate current practice in carrying out a life cycle impact assessment in accordance with ISO 14042. These are only examples of the total possible .ways. to satisfy the provisions of ISO 14042.

定价： 1684元 / 折扣价： 1432 元

1 Scope This Technical Report provides examples about practices in carrying out an Life Cycle Inventory analysis (LCI) as a means of satisfying certain provisions of ISO 14041. These examples are only a sample of the possible cases satisfying the provi

定价： 1001元 / 折扣价： 851 元

4.1 The test results provide an indication of the motor life of an electric vacuum cleaner. The end of the motor life will be judged in accordance with Section 3.1.1 This test method is limited to motor life evaluation of central vacuum cleaners.1.2 This test method provides a test to determine operating life of the motor, before servicing is needed, by an accelerated laboratory procedure. The motor is tested while mounted and is operated in central vacuum cleaner.1.3 The values as stated in inch-pound units are to be regarded as the standard. The values in parentheses are for information only.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车

1 Scope This Technical Specification provides the requirements and a structure for a data documentation format, to be used for transparent and unambiguous documentation and exchange of Life Cycle Assessment (LCA) and Life Cycle Inventory (LCI) data, th

定价： 1183元 / 折扣价： 1006 元