During free expansion, no work is done by the gas.

More than 13.6 million jobs have been created during the 55-month expansion.

During its major expansion in the 1990s and early 2000s, many new large homes were built.

In 2009, the hospital opened a new heart care center during its latest expansion.

This area opened during the most recent expansion in November 2005.

Workers made some gains during the economic expansion of the 1970s.

The station was built in 1868 during the expansion of the city towards the west.

During the economic expansion of the 1990's, job growth averaged 201,000 a month.

It is necessary to heat the air or the engine during expansion.

But the evidence of that during the most recent economic expansion has been scarce.