内侧连接 meaning in English

back connection

Calculation results show that it is the dangerous area of failure of cylindrical shell for a hole on steam expanding vessel by tangential pipe , it makes the stress distribution in the adjoining area complex , and causes obvious stress concentration , and makes the stress value become greater in the linking area of the pipe and the cylinder the biggest stress occurs in the inner side of pipe with the connection of cylindrical shell , and with the increase of distance , the stress is reduced
计算结果表明，蒸汽扩容器筒体上开孔设置切向接管，使连接区的应力分布复杂化，并产生明显的应力集中，接管与筒体连接处应力值较大，最大应力发生在接管与筒体连接处且位于接管上部位内侧，是筒体失效的危险区域；各类应力最大值均发生在蒸汽扩容器与切向接管的内侧连接处，并随着离该处距离的增加而减小。