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едноезични примери (не са проверени от PONS редакцията)
The fully welded piston deck forms a gas tight surface, which rests on the piston support structure when the gasholder is depressurised.
en.wikipedia.org It presumably went onto the top when the gasholder was low, and was trapped as the level rose.
en.wikipedia.org Once actuated, by the piston fender, the volume relief valves allow the stored gas to escape to atmosphere at a safe height above the gasholder roof.
en.wikipedia.org The original gasholder was removed from the first building in 1919.
en.wikipedia.org The dry seal gasholder has four major elements: the foundation; the main tank; the piston and the sealing membrane.
en.wikipedia.org