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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Vertical live loads include all vertical live loads other than dead loads. Lateral live loads are external forces due to the action of wind, earth, and hydrostatic pressure.

除了恒载以外的所有竖向荷载都可算是竖直活荷载。侧向活荷载是由于风压、土压和静水压力作用引起的外力。

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