Precast Building Block with Molded-in Recesses
![pre-cast-building-block pre-cast building block with molded-in recesses](https://www.innovation-creativity.com/wp-content/uploads/2021/01/pre-cast-building-block.jpg)
Precast building blocks with molded-in recesses to take electric outlet boxes. This would save a lot of hammering and chipping out of concrete.
By H.P.Fischer, Rochester, Pa.
July 1962
Precast building blocks with molded-in recesses to take electric outlet boxes. This would save a lot of hammering and chipping out of concrete.
By H.P.Fischer, Rochester, Pa.
July 1962
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