| Acronym | Meaning |
 | SEB | Support Equipment Building |
| MET | Mission Events Timer |
| MR | Mixture Ratio |
| LEM | Laboratory Environment Model |
| GR | Ground R@le |
| CBE | Connector Bracket |
| SBA | Seat Back Assembly |
| OT | Operational Instrumentation MDM-Tank |
| IC/ES | Intercommunication/Emergency Station |
| DDDU | Digital Decoder Driver Unit |
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