| item | description | category | filter | more on... |
| PDRR | Pee Dee River Railroad Corporation | Regional/Railroads |
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| PDRR | Program Definition and Risk Reduction life cycle phase | Governmental/US Gov. |
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| PDRR | Program Definition and Risk Reduction life cycle phase | Governmental/Military |
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| PDRR | Program Definition and Risk Reduction life cycle phase | Governmental/NASA |
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