I am going to guess (you should VERIFY) the gas is nitrogen. The advantage is that nitrogen does not expand like air, so thermal issues won't effect how well it closes when filled with nitrogen.
Mine is only a guess.
I am going to guess (you should VERIFY) the gas is nitrogen. The advantage is that nitrogen does not expand like air, so thermal issues won't effect how well it closes when filled with nitrogen.
Mine is only a guess.
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