| 摘要 |
The method includes a first step of forming a main body (19) after upper and lower main jigs (17, 17') are installed on a press and a tubular material (18) is pressed within the main jigs (17, 17'); a second step of filling the main body (19) with a catalyst (10); and a third step of forming a tapered part (21) at both sides of the main body (19) by sizing jigs (20, 20').
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