| 摘要 |
The present invention relates to a plate to manufacture a muffler pipe. The plate to manufacture a muffler pipe is described as follows. Multiple embossed portions are formed on at least one end of a rectangular metal plate. The embossed portions are recessed on one surface of the metal plate and protrude from the other surface. The embossed portions are formed to be symmetrical on the basis of the longitudinal center line of the metal plate. Therefore, the present invention prevents the muffler pipe from bursting during a pipe expanding process. |
