圆孔型 meaning in English

round former

In consideration of time and budget factor , the first step is to manufacture 8 - type ( groove axle structure ) and circle bore type mechanical heart valve . here , the concentration is on the structure design , process and process equipment design , and manufacture of valve on a trial basis
考虑到时间进程和经费因素，初步选定进行8字型凹槽枢轴结构平面瓣型及圆柱孔枢轴圆孔型心瓣进行试制加工，本论文工作的重点是人工心脏瓣膜的结构设计，工艺和工艺装备设计，以及人工心脏瓣膜试制。