Photo 1: Low pressure water seal ( x 4 cm; unknown) Photo 2: Gas holder with moving water level and open water tank (4,5 x 7 cm; unknown) Photo 3: Water lock in normal company (4,5 x 6,5 cm; unknown) Date: 1947 Keywords: metalworking, drawings, waterlocks

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Size: 2224px × 3146px
Photo credit: © BNA Photographic / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: