| 摘要 |
An exhaust pipe for a fuel burning engine including a hollow body, the body having an internal surface, an external surface, a first open end, a second open end and a longitudinal axis, wherein the internal surface is shaped to form standing cyclic wave geometry having at least 2 cycles (c). When gas containing inhalable particles enters the exhaust pipe through the first open end and flows out of the exhaust pipe through the second open end, a substantial amount of inhalable particles are grouped to form filterable particles. |
