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Two photographs of air pumps, photograph, page, Above an air pump with a plate and a clock, below
LZT26A77_100

Two photographs of air pumps, photograph, page, Ab...

Model of a hydrostatic press, photograph, page, number: 'No. 55.', photographer: Fredrich Wilhelm
LZT26A77_099

Model of a hydrostatic press, photograph, page, nu...