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This article is about unit. For Altairan, see Hubbald.

The hubald is an Altairan unit of pressure. The vents in the Altairan underground facility rose from 6 hubald units until they reached 12 hubald units. When this happened the computer announced that catastrophic coolant failure was imminent. However, the pressure was successfully vented and this is not happen. (SG1: "Tin Man")