a wooden door would not be able to withstand the pressure of the gas used in a gas chamber
A poisonous gas wouldn't need to be pressurized in a fully sealed chamber/container is order to do its job. It's not necessary to pressurize the gas because it would just simply need to be inhaled and ambient pressure is fine for that purpose.
and would not provide a proper seal to contain the gas
This is the answer. A wooden door would leak the poisonous gas out and cause harm to others who are not inside the chamber.
But the gas chambers are jew lies. The wooden doors do prove that it didn't happen, but the jew lies are vast and committed so the notion won't disappear easily in the general public.
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