GB/T 50165-2020.Technical standard for maintenance and strengthening of historic timber building. 1总则 1.0.1 为贯彻执行国家有关法律法规，加强对古建筑木结构的科学保护，使古建筑得到正确的维护与加

GB/T 27021.6-2020.Conformity assessment-Requirements for bodies providing audit and certification of management systems-Part 6: Competence requirement

GB/T 23809.1-2020.Emergency guidance systems-Setting principles and requirements-Part 1:Inside buildings. 1范围 GB/T 23809的本部分规定了公共建筑物内以安全标志和安全标记为主要导向要素

GB/T 10066.12-2020.Test methods for electroheating installations-Part 12: Infrared electroheating installations. 1i范围 GB/T 10066.12规定了工业红外电热装置的试验程序、条件

GB/T 16900.4-2020.Rules for the presentation of graphical symbols-Part 4:Method for testing symbol referent association. 1范围 GB/T 16900的本部分规定了用于测试图形符号

GB/T 50455-2020.Standard for design of underground oil storage in rock caverns. 1总则 1.0.1 为统一地下水封石洞油库设计技术要求,做到安全适用、节能环保技术先进、经济合理,制定本标准。 1.0.2 GB/T 504

GB/T 2423.51-2020.Environmental testing-Part 2:Test methods-Test Ke: Flowing mixed gas corrosion test. 1范围 GB/T 2423的本部分用于确定工作和贮存的室内环境对电工电子产品元件、设备和材料,

GB/T 39053-2020.Specification of credit assessment for merchants on cross-border E-commerce platform. 1范围 GB/T 39053规定了跨境电子商务平台上的商家信用评价相关术语和定义、缩略语、基本要

GB/T 38973-2020.Titanium and titanium alloy bars for additive manufactural powder. 1范围 GB/T 38973规定了增材制造制粉用钛及钛合金棒材(以下简称棒材)的技术要求、试验方法、检验规则和标志、包装、运输、贮存、

GB/T 20975.37-2020.Methods for chemical analysis of aluminium and aluminium alloys-Part 37 : Determination of niobium content. 1范围 GB/T 20975的本部分规定了纸上

GB/T 38975-2020.Tantalum and tantalum alloy powder for additive manufacturing. 1范围 GB/T 38975规定了增材制造用钽及钽合金粉的技术要求、试验方法、检验规则及标志、包装、运输、贮存、质量证明书、订货单(或合同)内

GB/T 38972-2020.TiB2 particulate reinforced aluminum alloy powder for additive manufacturing. 1范围 GB/T 38972规定了增材制造用硼化钛(TiB2 )颗粒增强铝合金粉的技术要求、试验方法、检验规则、