Plastics piping systems - elastomeric sealing ring type joints and mechanical joints for thermoplastics pressure piping - test method for leaktightness under external hydrostatic pressure ; german version en 911 : 1995 塑料管道系统.热塑塑料压力管道用的弹性密封环型接头
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Plastics piping systems . elastomeric sealing ring type joints and mechanical joints for thermoplastics pressure piping . test method for leaktightness under external hydrostatic pressure 塑料管道系统.热塑塑料压力管道用的弹性密封环型接头和机械接头.外部液压条件下防漏密封试验方法
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Plastics piping systems - elastomeric sealing ring type joints and mechanical joints for thermoplastics pressure piping - test method for leaktightness under external hydrostatic pressure 塑料管道系统.热塑塑料压力管道用的弹性密封环型接头和机械接头.外部流体静压条件下防漏密封试验方法