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The Boston Globe


Factory explosion believed to have ignited in acid room

PETERBOROUGH, N.H. — A factory explosion that blew out windows and injured more than a dozen people probably originated in a room where acid is used to treat the surface of ball bearings, but it could be weeks before the exact cause is determined, investigators said Tuesday.

The blast Monday afternoon at New Hampshire Ball Bearings Inc. shattered glass, dislodged ceiling tiles, and damaged walls.

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