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1969 – NR-1 Submersible – General Dynamics (American)

1969 – NR-1 Submersible by General Dynamics. Early design sketch of the NR-1 sub. Builder: General Dynamics Electric Boat Laid down: 10 June 1967 Launched: 25 January 1969 Source: Wikipedia NR-1 is able to land on the seafloor on a pair of retractable wheels and can lift heavy objects with…
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1923 – EPRON-1 Humidistat – E. G. Danilenko (Russian)

1923 - EPRON-1 Humidistat - E. G. Danilenko. Гидростат Даниленко Е.Г. «Ð­ÐŸÐ ÐžÐ-1» Source: here. Original text by Alexey Rasshivalov, translated to English by Google translate. The first domestic ( and second in the world) DHD humidistat , better known as " EPRON -1 ." Built in 1923, the project EG…
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