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On the other hand, the yeasts and algae required carbon dioxide and yielded copious amounts of oxygen as they grew. In Roger Hunter's little orbit-ship the ventilation shafts were small, a loose network of foot-square ducts leading from the central pumps and air-reconditioning units to every compartment in the ship. But in a ship of this size.... The grill was over a yard wide, four feet tall.
Bulkheads demolished, gaping holes torn in the outer shell, the air-reconditioning units smashed beyond repair.... Tawney buzzed for his first mate. An emergency switch cut into the line, with the frantic voice of a section chief. Johnny Coombs had been spotted disappearing into the ventilator shaft in the engine sector. "Well, go in after him!" Tawney screamed.
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