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NASA engineers and astronauts have used duct tape in the course of their work, including in some emergency situations.
One such usage occurred in 1970, when the square carbon dioxide filters from Apollo 13's failed command module had to be modified to fit round receptacles in the lunar module, which was being used as a lifeboat after an explosion en route to the moon.
A workaround used duct tape and other items on board Apollo 13, with the ground crew relaying instructions to the flight crew.
The lunar module's CO < sub > 2 </ sub > scrubbers started working again, saving the lives of the three astronauts on board.

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