| 摘要 |
A honeycomb filter includes at least one pillar-shape honeycomb structured body including a plurality of cells partitioned by partitions, and plugs for sealing upstream openings of a plurality of first cells selected from the plurality of cells and for sealing downstream openings of a plurality of second cells selected from the plurality of cells. Each of the plugs is formed of a material having a greater total content of aluminum, iron, boron, silicon, and free carbon than a material forming the honeycomb structured body.
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