绿色食品标准体系是绿色食品发展理念的技术载体，是绿色食品生产和管理的技术指南，是绿色食品事业持续健康发展的技术保障。我们立足精品定位，瞄准国际先进水平，按照“安全与优质并重、先进性与实用性相结合”的原则，严格落实“从土地到餐桌”全程质量控制理念，建立了一套定位准确、结构合理、特色鲜明的标准体系，包括产地环境标准、生产技术标准、产品标准、包装贮运标准和其他标准共5个部分，对绿色食品生产的产前、产中和产后全过程各环节进行规范。截至2016年年底，农业部共发布绿色食品标准270项，现行有效的标准141项（其中，基础通用技术标准15项，产品标准126项）。这些标准的颁布实施，为指导和规范绿色食品的生产行为、质量技术检测、标志许可审查和证后监管提供了依据和准绳，为促进绿色食品事业持续健康发展发挥了不可替代的作用。

This Specification is provided for the purpose of guiding the construction of falsework for cast-in-place construction of railway concrete girders，harmonizing main technical requirements，enhancing construction management，and ensuring construction quality.This Specification is applicable to the falsework for cast-in-place construction of simply-supported or continuous girders.

《系统工程手册：系统生命周期流程和活动指南（原书第4版中英对照版）》中，建模和仿真已被定义为跨系统生命周期流程的系统工程共性方法，用以实现对系统概念的完整性表达，支持系统需求、设计、分析、验证与确认活动的开展，涉及建模目的、标准、范围、类型、语言等内容。建模与仿真都是用抽象在应对具体，再用形式描述物理，这是建模与仿真的核心。许多模型和仿真实践已被正规化为SE流程，且众多建模语言已成为国际标准，如SysML、UML等，在“基于模型的”背景环境下，支持SE学科的有关方法论、流程、方法和工具已日趋成熟，且在航空航天／防务领域已被证明。

This part specifies the system services，system composition，networking modes，system functions，technical requirements，marks，Packaging，transportation and storage related to railway dispatch communication system.This part is applicable to the design，manufacture and acceptance of railway dispatch communication system for the sections with or without GSM-R in both new railway projects and reconstruction projects.

This standard specifies the technical requirements，inspection，acceptance，transport and storage of electric locomotive car bodies.This standard is applicable to the design，production and acceptance of newly constructed electric locomotive car body with standard gauge of 1 435 mm （hereinafter referred to as car body）.For car bodies of other types，this standard can be followed. This standard is also applicable to car bodies of other types.

The guide is developed to unify technical requirements for the construction of green corridor for railways，for the purpose of stabilizing slopes，conserving water and soil，improving environment，preventing disasters and landscaping.The guide is applicable to the design，construction，quality inspection and acceptance of green corridor for new railway project and railway reconstruction project.

The copper and copper alloy stranded wires mentioned in this standard only refers to some stranded wire products in field of electric wires and cables used for electrified railways.They have many specifications and stranding types.According to their different functions and positions installed on overhead contact line system （OCS）for electrified railways，these stranded wires are called in different ways，including catenary，auxiliary catenary，head span wire，upper cross span wire，lower cross span wire，mid anchor wire，stitch wire and dropper.This standard focuses on the requirements on technical parameters and technical performance.For the convenience of description and to be in accordance with the names of products in electric wire and cable industry，the term of stranded wires is adopted in this standard instead of the railway terms mentioned above.The flexible copper stranded wires used for electric connection in OCS are not included in this standard for being regarded as a general product.

The rig test of locomotives and rolling stocks is an effective approach for research and development of locomotives and rolling stocks，and this standard is formulated in order to normalize the test and promote the test quality.For the purpose of this standard，dynamics test standards for locomotives and rolling stocks，i.e. Railway Vehicles-Speci fication for Evaluation the Dynamics Per formance and Accreditation Test （GB/T 5599-1985） and Appraisal Method and Evaluation Standard for Dynamics Performance Test of Railway Locomotives （TB/T 2360-1993） are referred to.The test items and methods proposed in this standard are basically in conformity with two standards above.At the same time，according to features and capacity of the rig test，the suspension self-vibration characteristic test for locomotives and rolling stocks and the car body vibration mode test for locomotives and rolling stocks are proposed.

This Specification is formulated with a view to standardizing the technical work of geological prediction of railway tunnels，improving the level of geological prediction and guaranteeing the tunnel construction quality and safety.This Specification is applicable to the geological prediction of new railway tunnels.

This part of GB/T25020 specifies product category， technical requirements， test methods， inspection rules， marking， delivery certificate， storage and transport of the square steel tube pole for overhead contact line system of electrified railways.This part applies to the square steel tube pole for OCS of electrified railways （hereafter abbreviated as square steel tube pole）. It can be taken as reference for the same type of square steel tube pole of OCS for urban rail transit.