定价： 689元 / 折扣价： 586 元

定价： 689元 / 折扣价： 586 元

定价： 689元 / 折扣价： 586 元

定价： 605元 / 折扣价： 515 元

定价： 156元 / 折扣价： 133 元

定价： 345元 / 折扣价： 294 元

定价： 605元 / 折扣价： 515 元 加购物车

定价： 345元 / 折扣价： 294 元

定价： 481元 / 折扣价： 409 元 加购物车

定价： 689元 / 折扣价： 586 元 加购物车

定价： 3601元 / 折扣价： 3061 元 加购物车

定价： 156元 / 折扣价： 133 元

4.1 These practices provide a means for evaluating traveled surface-roughness characteristics directly from a measured profile. The calculated values represent vehicular response to traveled surface roughness.4.2 These practices provide a means of calibrating response-type road-roughness measuring equipment.41.1 These practices cover the calculation of vehicular response to longitudinal profiles of traveled surface roughness.1.2 These practices utilize computer simulations to obtain two vehicle responses: (1) axle-body (sprung mass) motion, or (2) body (sprung mass) acceleration, as a function of time or distance.1.3 These practices present standard vehicle simulations (quarter, half, and full car) for use in the calculations.1.4 The values stated in SI units are to be regarded as the standard.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

AbstractThese practices cover the different procedures employed in performing four types of treatments for the preparation of aluminum and aluminum alloy surfaces for painting. These processes are broadly classified into the following treatment types: solvent cleaning (Type A); chemical treatments (Type B); anodic treatments (Type C); and mechanical treatments (Type D). Service conditions shall dictate the type of surface preparation that should be employed, although the quality produced by any individual method may still vary with the type of alloy involved. Solvent cleaning does not disturb the natural oxide film on the metal and is applicable in ambient indoor or very mild service conditions. This treatment type may be performed by three methods, as follows: manual swabbing or dip washing; solvent spray cleaning; or vapor degreasing. Chemical treatments may be employed by the following eight methods: alkaline cleaners; sulfuric acid, chromium trioxide etch; alcoholic phosphoric acid cleaner; crystalline phosphate treatment; amorphous phosphate treatment; carbonate chromate treatment; amorphous chromate treatment; or 8) acid-bound resinous treatment. Anodic treatments will provide a protective inert oxide coating which increases corrosion resistance and promotes paint adhesion. This is recommended where maximum corrosion resistance by the treatment itself is desired, but should not be used on assemblies of dissimilar metals. This treatment type may be executed by two methods, namely: sulfuric acid anodic, or chromium trioxide anodic treatment. Mechanical treatments may be implemented by these two methods: hand or power wire brushing or other abrasive treatment; or sandblasting.1.1 These practices cover four types of treatment for preparation of aluminum and aluminum-alloy surfaces for painting, as follows:1.1.1 Type A—Solvent Cleaning.1.1.2 Type B—Chemical Treatments.1.1.3 Type C—Anodic Treatments.1.1.4 Type D—Mechanical Treatments. These four types cover a number of procedures, as described herein.1.2 Variations in surface treatment produce end conditions which differ, and which do not necessarily yield identical results when paints are applied. Service conditions will dictate the type of surface preparation that should be selected, although the quality produced by any individual method may vary with different alloys.1.3 This standard may involve hazardous materials, operations, and equipment. 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.1.4 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

5.1 These practices provide a means for evaluating truck ride quality and pavement loading exerted by truck tires.1.1 These practices cover the calculation of truck response to longitudinal profiles of traveled surface roughness.1.2 These practices utilize computer simulations to obtain two truck responses including: sprung and unsprung mass vertical displacement, velocity, and acceleration; and sprung mass pitch angular displacement, velocity, and acceleration.1.3 These practices present standard truck simulations (quarter truck, half-single unit truck, and half-tractor semitrailer) for use in the calculations.1.4 The values stated in SI units are to be regarded as the standard.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