underwater breathing apparatus. DE2907416 (filed 26 February 1979): Unterwasser-Atmungsgerät. This German patent application relates to underwater breathing... 23 KB (2,746 words) - 13:35, 19 February 2024 |
underwater breathing apparatus. DE2907416 (filed 26 February 1979): Unterwasser-Atmungsgerät. This German patent application relates to underwater breathing... 23 KB (2,746 words) - 13:35, 19 February 2024 |