| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To discharge only cleaned exhaust gas to the atmosphere by providing filters before and after, or after a silencer of a muffler of an internal combustion engine and reserving hazardous material. <P>SOLUTION: The filters inserted before and after, or after the silencer can simply be attached or detached by even an amateur, a maker can replace it by a new filters inexpensively, the used filter is treated by the maker with responsibility, and an exhaust system is cleaned. <P>COPYRIGHT: (C)2004,JPO</p> |
