GB/T 39884-2021.Examination methods for three components in cannabis in suspected drugs- Gas chromatography and gas chromatography-mass spectrometry.

GB/T 9966.17-2021.Test methods for natural stone-Part 17 : Determination of resistance to salt crystallization. 1范围 GB/T 9966的本部分规定了测定天然石材盐结晶强度的原理、仪器设

GB/T 40054-2021.Societal security-Emergency management-Guidelines for public warning. 1范围 GB/T 40054提供了在突发事件发生的事前、事中和事后,公共预警的构建、管理和实施的指南。 GB/T 40054适用

GB/T 9966.16-2021.Test methods for natural stone-Part 16:Determination of linear thermal expansion coefficient. 1范围 GB/T 9966的本部分规定了天然石材线性热膨胀系数试验的原理、仪

GB/T 39782-2021.Specifications for safe firing area map-drawing of anti-aircraft gun at weather modification operating spots. 1范围 GB/T 39782规定了人工影响天气高

GB 8999-2021.General regulation of quality assurance for ionizing radiation monitoring. 1适用范围 GB 8999规定了电离辐射(以下简称辐射)监测质量保证的通用要求。 GB 8999适用于为辐射防护和放射性污染

GB/T 39994-2021.Determination of six metal elements (iron, calcium, magnesium,zinc，titanium, copper) in polyolefin pipe system. 1范围 GB/T 39994规定了聚烯烃管道

GB/T 40044-2021.Specification of warehouse distribution information exchange in express service manufacturing industry. 1范围 GB/T 40044规定了快递服务组织与制造企业在仓

GB/T 51439-2021.Standard for urban pedestrian and bicycle transport system planning. 1总则 1.0.1 为保障城市步行 和自行车交通空间，提升步行和自行车交通出行安全与品质，科学利用空间资源，制定本标准。 1.0.

GB/T 51422-2021.Technical standard for test ，appraisal and strengthening of metal building envelope system. 1总则 1.0.1 为在建筑金属板围护系统的检测、鉴定、加固与改造过程中，做到技术可