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lifting jacks, hydraulic facilities

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Sudbury River Conduit, B.W.W., div. 4, sec. 15, Oct. 18, 1876. View of central portion of large centring showing jack screws.

Sudbury River Conduit, B.W.W., div. 4, sec. 15, Oct. 18, 1876. View of...

Public domain image of an industrial building, factory, structure, works, 19th-20th century industrial revolution, free to use, no copyright restrictions - Picryl description

Sudbury River Conduit, B.W.W., div. 4, sec. 15, Oct. 18, 1876. View of central portion of large centring showing jack screws.

Sudbury River Conduit, B.W.W., div. 4, sec. 15, Oct. 18, 1876. View of...

Public domain image of an industrial building, factory, structure, works, 19th-20th century industrial revolution, free to use, no copyright restrictions - Picryl description