DK44232C -
Procedure for the photochemical production of imprints of the vein and the surface drawing of natural substances, such as wood, marble and the like.
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Procedure for the photochemical production of imprints of the vein and the surface drawing of natural substances, such as wood, marble and the like.
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DK44232D1928-03-221929-03-21
Procedure for the photochemical production of imprints of the vein and the surface drawing of natural substances, such as wood, marble and the like.
DK44232C
(en)