成人婷婷网色偷偷亚洲男人的天堂 ,99久久精品国产一区二区三区

TranslationMobile

My neighbors have started to refer to my home as the man hole
現(xiàn)在鄰居們把我家說成是男人洞
Appendix man hole
輸氣管進入孔
Based on some discussions on the mathematic model set up for the cathodic protection potential field , a two - dimensional boundary element method ( bem ) is developed , and by using which , a study on the shielding effect resulted from some typical inner structures such as the reinforcing elements and the partition walls with man holes on distribution of potential and current density in the cathodic protection is performed . the investigated parameters which affect the shielding effect in the calculating model include : the height and thickness of the reinforcing elements , the distance between the anode and the reinforcing elements , and the diameter of man hole on the partition walls , and so on
本文在討論了陰極保護電位場問題的數(shù)學模型的基礎上，以二維邊界元法對陰極保護問題中的電位及電流密度分布進行了模擬計算，重點對船舶壓載艙中的典型結(jié)構(gòu)如加強筋、人孔等在陰極保護中所產(chǎn)生的屏蔽效應進行了分析和研究，通過對不同高度、厚度的擋板及不同孔徑的帶孔板所產(chǎn)生的屏蔽效應進行模擬計算，首次得到了一些對實際工程設計具有重要參考意義的見解。