| 摘要 |
A pillar or board is formed of a casing, filling materials, and at least one plug. The casing is made of the discarded recyclable paper and is provided with at least one opening. The filling materials are sawdust and the discarded wood blocks, which are encased by the casing. The plug is made of the discarded recyclable paper and is used to stop up the opening of the casing.
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