This paper gives the definition of P-hereditary ring and discusses the necessary and sufficient condition about the submodule closure of cyclic module.
本文给出p—遗传环的定义及循环模的子模闭的充要条件。
Initially, the approach involved a simple ring closure, but this technique failed because the deeper aponeurotic tissues could not be approximated without tension in the repair.
最初是用一种单环闭合，但因深层腱膜组织在修补中不能无张力拉拢而失败。
Metal cock ring soft seat surface pressure to the bearing surfaces, such as the valve core and valve seat is concentric ring surface can be a double tight closure.
金属旋塞表面压向阀座环软支座表面，如阀芯和阀座环表面是同心的，就能得到双重严密的关闭。
Moreover, the olive t imine also can be cycled and concentrated for use after passing through filter mass washing mother solution after ring closure.
橄榄t亚胺经闭环后的滤饼洗涤母液水还可以循环浓缩使用。
Besides, the structure optimization and design for the split-ring type LKT quick-opening closure is also performed in this article.
本文还针对剖分环式LKT天然气过滤器快开盲板结构，进行了有限元结构优化分析和设计。
Besides, the structure optimization and design for the split-ring type LKT quick-opening closure is also performed in this article.
本文还针对剖分环式LKT天然气过滤器快开盲板结构，进行了有限元结构优化分析和设计。
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