Photo 1: Thermal precipitator (14,5x10,5 cm; unknown) Photo 2: Arrangement of the filter device for dust determination (14,5x10,5 cm; unknown) Date: undated Keywords: filter devices, precipitators
Size: 3149px × 2223px
Photo credit: © BNA Photographic / Alamy / Afripics
License: Licensed
Model Released: No
Keywords:
