Cardiac valve operation

• 心脏瓣膜手术

Cardiac valve operation的用法和样例：

例句

1. Heart valve surgery, who has the case of this respect?
   心脏瓣膜手术，谁有这方面的案例吗？
2. But by utilising a pushrod valve operation system we could solve this problem.
   但是，通过使用一的两个瓣膜手术系统，我们可以解决这个问题。