1969 Press Photo New Product of the Physical Institute at the Bulgarian Academy

New products at the 25th International Trade Fair in Plovdiv: Photo shows a vacuum machine - new product of the Physical Institute at the Bulgarian Academy of Sciences to be used for creating vacuum conditions in labs. giving pressure from 760 to 10.7 tores.

Photo measures 7 x 9.75 inches.

Photo is dated 9--1969.

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