137762 ⎘
Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using spirally or helically shaped channels in combination with sound-absorbing materials
Methods of and systems for constraining fibrous material during filling operation
#2Compact muffler for small two-stroke internal combustion engines
#3Exhaust system for motorcycle
#4MUFFLER OF A EXHAUST SYSTEM
#5Spiraltrap: devices and methods for the trapping particulate matter in exhaust and of other pollutants
#6Backpressure reducing exhaust system with stationary blade structure