orifice mixer

例句：

1. 1. The surgeon carefully opened the patient's mouth to examine the inside.
   外科医生小心翼翼地打开病人的嘴巴进行检查。
2. 2.The scientist discovered a new orifice in the ocean floor.
   科学家在海底发现了一个新的开口。
3. 3. The engineer designed an orifice for the ventilation system.
   工程师为通风系统设计了一个开口。