《塑料管道系统塑料管道弹性密封圈接头负压、偏角和变形条件下密封性能试验方法》标准立项与发展研究报告

EnglishTitle:DevelopmentResearchReportontheStandardizationProject:“Plasticspipingsystems—Elastomericsealingringtypejointsforplasticspressurepipes—Testmethodforleaktightnessundernegativepressure,angulardeflectionandd