| No TPTP formula. May not be expressible in strict first order. | Economy.kif 5235-5244 |
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| No TPTP formula. May not be expressible in strict first order. | Economy.kif 5224-5224 | WoodProduct 是 ForestProduct 的 subclass |
| No TPTP formula. May not be expressible in strict first order. | Economy.kif 5225-5225 | WoodProduct 是 有机化合物 的 subclass |
| No TPTP formula. May not be expressible in strict first order. | Economy.kif 5226-5226 | WoodProduct 是 植物物质 的 subclass |
| No TPTP formula. May not be expressible in strict first order. | Economy.kif 5278-5278 | Hardwood 是 WoodProduct 的 subclass |
| No TPTP formula. May not be expressible in strict first order. | Economy.kif 5405-5405 | Softwood 是 WoodProduct 的 subclass |
| No TPTP formula. May not be expressible in strict first order. | Economy.kif 5495-5495 | 原木材 是 WoodProduct 的 subclass |
| No TPTP formula. May not be expressible in strict first order. | Economy.kif 5532-5532 | 木料 是 WoodProduct 的 subclass |
| No TPTP formula. May not be expressible in strict first order. | Economy.kif 5572-5572 | 木制神器 是 WoodProduct 的 subclass |
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