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Defense housing, Erie, Pennsylvania. Concrete flooring is poured over the wire reinenforcements. The large container shuttles from the mixer to the desired location, supported by a movable crane. Three men, aided by a crew of levelers, can lay a floor of four-unit building in a few hours

Defense housing, Erie, Pennsylvania. Concrete flooring is poured over ...

Public domain photograph of Pennsylvania in 1930s, free to use, no copyright restrictions image - Picryl description

Defense housing, Erie, Pennsylvania. Concrete flooring is poured over wire reinforcements. The large container shuttles from the mixer to the desired location, supported by a movable crane. Three men, aided by a crew of levelers, can lay a floor of a four-unit building in a few hours

Defense housing, Erie, Pennsylvania. Concrete flooring is poured over ...

Picryl description: Public domain image of military vehicle, automobile, tractor truck, free to use, no copyright restrictions.