Selfmade FFM (FullFaceMask) reworked from Gasmask

[АлександрД]

It reminds me of the divers that went under Chernobyl to fix the water leaks.

here is some more details about this story Chernobyl divers - truth or legend? . They was not an underwater divers. They did not fix the water leaks, they help to drain water from bubbling chamber.