suction and discharge valve seat

例句：

1. 1.The suction and discharge valve seat is essential for maintaining the proper functioning of the system.
   吸入和排放阀座对于保持系统正常工作至关重要。
2. 2. The engineer carefully inspected the suction and discharge valve seat to ensure it was in good condition.
   工程师仔细检查了吸入和排放阀座，以确保其处于良好状态。
3. 3. The technician replaced the worn-out suction and discharge valve seat with a new one.
   技术人员用一个新的吸入和排放阀座替换了磨损的部件。