main muffler

例句：

1. 1. The main muffler is designed to reduce noise from the engine.
   主消声器的设计是为了减少发动机产生的噪音。
2. 2.Main mufflers are often used in vehicles to absorb sound.
   主消声器通常用于车辆中，以吸收声音。
3. 3.The main muffler was replaced after several years of use.
   经过几年的使用后，主消声器被更换了。