The new techniques were introduced progressively, but between 1912 and 1913 output doubled from 3,000 to 6,000 cars.

Finally, standards and thresholds going far beyond the Commission's proposal have been progressively introduced.

More stringent laws and guidelines are being progressively introduced to keep the profession in check.

In response, the league progressively introduced a range of new interpretations giving it the power to penalise players for similar actions.

This reform starts from the 1995-1996 academic year for freshmen and will be progressively introduced every year.

Other courses will be introduced progressively over time.

In 1999, a new series of renminbi banknotes and coins was progressively introduced.

In future years, they will progressively introduce Year 9, Year 10, etc.

The EMUs were progressively introduced into service between 1979 and 1987.

With each following version from 0.01 to 0.09 new features and content were progressively introduced, along with various bug fixes.