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。
The spheric stress induced by tectonics is called an additional tectono-hydrostatic pressure, which is a basic of new method of measurement and calculation of fomation depth of geological actions.
通过三维应变应力测量，这两部分力通过计算是可以区分开的，因而这将是建立地下深度测算新方法的一个基础。
The spheric stress induced by tectonics is called an additional tectono-hydrostatic pressure, which is a basic of new method of measurement and calculation of fomation depth of geological actions.
通过三维应变应力测量，这两部分力通过计算是可以区分开的，因而这将是建立地下深度测算新方法的一个基础。
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