Plastics piping systems - elastomeric - sealing - ring - type socket joints of unplasticized poly vinyl chloride for use with pvc - u pipes - test method for leaktightness under negative pressure 塑料管道系统硬聚氯乙烯pvc - u管材弹性密封圈式承口接头负压密封试验方法
Plastics piping systems - elastomeric - sealing - ring - type socket joints for use with unplasticized poly vinyl chloride pipes - test method for leaktighness under internal pressure and angular deflection 塑料管道系统硬聚氯乙烯pvc - u管材弹性密封圈式承口接头偏角密封试验方法
Plastics piping systems - elastomeric - sealing - ring - type socket joints of unplasticized poly vinyl chloride for use with pvc - u pipes - test method for leaktightness under negative pressure 塑料管道系统.与未增塑聚氯乙烯管一起使用的未增塑聚氯乙烯弹性密封环式套筒接头.负压下的密封性试验方法
Plastics piping systems - elastomeric - sealing - ring - type socket joints of unplasticized poly vinyl chloride for use with pvc - u pipes - test method for leaktightness under negative pressure 塑料管道系统.与未增塑聚氯乙烯管件一起使用的未增塑聚氯乙烯合成橡胶密封圈式承窝接头.负压下防泄漏试验法
Plastics piping systems - elastomeric - sealing - ring - type socket joints for use with unplasticized poly vinyl chloride pipes - test method for leaktightness under internal pressure and with angular deflection 塑料管道系统.与未增塑聚氯乙烯管一起使用的弹性密封环式套筒接头.内压下角度偏转密封试验