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A device for preventing the explosions and poisoning by the gas in the same way as the gas leaks of the pipes in the apartments or closed positions, as well as the accumulation of the dangerous gases in the mine and other places the like
A device for preventing the explosions and poisoning by the gas in the same way as the gas leaks of the pipes in the apartments or closed positions, as well as the accumulation of the dangerous gases in the mine and other places the like