34 Transportation

34.01.00 Operation and Maintenance of Transportation

34.01.13 Operation and Maintenance of Roadways 34.01.23 Operation and Maintenance of Railways 34.01.23.13 Track Removal and Salvage 34.01.23.81 Track Crosstie Replacement 34.01.33 Operation and Maintenance of Airfields 34.01.43 Operation and Maintenance of Bridges

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