A lock through which people and/or materials can pass from the atmospheric area to the pressurized area of the TBM. Enables access to the tunnel face to control the cutting wheel, exchange tools or remove obstacles.

A glass or plastic device designed to use water as an insulator to protect the fermentation media from contamination and exposure to fresh air, while at the same time allowing carbon dioxide produced [..]

allows carbon dioxide to escape without allowing oxygen into the fermentation vessel. The chemical shorthand for carbon dioxide is CO2

Also known as the secondary fermentation vessel

Also known as the secondary

A compartment separating areas a different environment, especially different air pressures, that is used for entry to and departure from a spacecraft.

The pressure of air that holds water inside an overturned canoe if you attempt to lift it straight up.