GB/T 38516-2020.Permeable sintered metal materials-Determination of average pore size of medium flow. 1范围. GB/T 38516规定了可渗透性烧结金属材料的中流量平均孔径测定方法，包括试样、仪器

GB/T 38513-2020.Methods for chemical analysis of niobium hafnium alloys-Determination of hafnium , titanium , zirconium , tungsten , tantalum contents

GB/T 38447-2020.Micro-electromechanical system technology- Fatigue testing method of MEMS structure using resonant vibration. 1范围 GB/T 38447规定了MEMS结构共

GB/T 38446-2020.Micro-electromechanical system technology-Test methods for tensile property measurement of strip thin films. 1范围 GB/T 38446规定了带状薄膜抗拉性能

GB/T 38465-2020.Test method of artificial leather and synthetic leather-Determination of cold resistance. 1范围. GB/T 38465规定了人造革合成革及其制成品耐寒性测定的原理、试样制备、试

GB/T 38464-2020.Test method of artificial leather and synthetic leather-Determination of rubbing resistance. 1范围 GB/T 38464规定了人造革合成革耐揉搓性的测定试样制备、试验方法、试

GB/T 38550-2020.Specifications for operation service of urban utility tunnel. 1范围 GB/T 38550规定了城市综合管廊运营服务的总则、基本流程、服务要求、质量评价。 GB/T 38550适用于城市综合管廊日常运营服务

GB/T 38552-2020.Code of practice for the safe use of mast climbing work platforms. 1范围 GB/T 38552规定了动力驱动的、用于人员在其上工作的导架爬升式工作平台(以下简称MCWP)的安全使用要求，包括安装、拆卸

GB/T 38442-2020.General constructions rules of gas burning appliances for domestic use. 1范围 GB/T 38442规定了家用燃气燃烧器具(以下简称燃具)的分类、型号、结构、材料、铭牌和说明书。 GB/T 384

GB/T 38530-2020.Town liquefied natural gas (LNG) gasification supply installations. 1范围 GB/T 38530规定了城镇液化天然气(LNG)气化供气装置(以下简称“LNG气化供气装置”)的分类、代号和型号、结构和材