| 摘要 |
This invention applies to the longitudinally grooved (2) casing pipe for a catalytic converter (1) used to clean exhaust gases and to the method of making longitudinal grooves, in which the tubular casing forming the outer shell of the catalytic converter cell is driven longitudinally through a groove constriction device (3) when a pressure bonding is achieved between the outer casing and the cell, inhibiting the movement of the cell inside the casing.<IMAGE>
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