"You mean a type of valve which would allow gas to be introduced into the line?"

New technology allowed gas to be extracted, where before it would remain underground.

By 1969 the production plant and distribution network were complete, allowing natural gas to be sold to consumers.

By allowing gases to expand, the gas is doing work and therefore losing internal energy.

Lady Ashland would not allow gas to be lit in the house, for it killed her flowers.

Wait five minutes to allow unburned gas in the furnace to escape.

This allows hot smoke and gases to escape through the opening returning the conditions of the room to normal.

Your stomach will empty faster, allowing gases to move into the small intestine.

The large entry hole made by the mine allowed gas to escape and a portion of the roof to sink.

Other states also allow electricity, firing squads, hanging and lethal gas.