YD/T 3814.2-2021 标准详情

Environmental testing - Part 2: Test methods - Guidance to test Kc: Sulphur dioxide test for contacts and connections

Technical requirements for the observation environment of seismic stations—Part 1: Seismometry

Networked manufacturing environment - Business interoperability protocol and model

Explosive atmospheres—Part 5：Equipment protection by pressurized enclosure “p”

Communication rules of the devices of surveillance and control system for expressway—Part 5：Tunnel environment detector

Classification of environmental conditions - Guidance for the correlation and transformation of environmental condition classes to the environmental tests - Introduction

Space environment—Laboratory calibration method for in-situ thermal plasma detection

Common test methods for insulating and sheathing materials of electric and optical cables - Part 41:Methods specific to polyethylene and polypropylene compounds - Resistance to environmental stress cracking - Measurement of the melt flow index - Carbon black and/or mineral filler content measurement in polythylene by direct combustion - Measurement of carbon black content by thermo gravimetric analysis(TGA)- Assessment of carbon black dispersion in polyethylene using a microscope