| 41. | Over the mass grave, a tent with a special air lock has been stretched and inflated.
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| 42. | The air lock carried by Atlantis cannot be installed without Canadarm2, making its proper operation critical.
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| 43. | Bloxsom and Angelique cited the air lock device as a contributor to the improvement in outcomes.
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| 44. | The only noteworthy problem Saturday was the amount of time it took to depressurize the air lock.
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| 45. | Late Wednesday, the astronauts replaced a leaky ventilation valve at the inner entrance of the air lock.
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| 46. | The air lock adds that capability, plus more room to venture outside with big pieces of equipment.
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| 47. | Finally, they were let through an air lock guarded by massive metal doors into the reactor structure.
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| 48. | They will use the new Russian air lock for two spacewalks in October and another in November.
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| 49. | An air embolism in a large vein can also cause a dangerous air lock in the heart.
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| 50. | As soon as the air lock was bolted in place, the spacewalkers hooked up its electrical supply.
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