This type has been constitutionally tested and is sound under certain conditions.

Some types have been scientifically tested more than others.

Two types of helicopters are being tested for this role:

In addition, only the most common types of trades and securities will be tested this week.

A new type of suspension is also being tested by at least one contestant.

Two improved types were tested in the Thames between 1620 and 1624.

Other types of antineoplastons have not been tested in animals.

Two types of road are being tested by Government research centres.

New types of treatment are being tested in clinical trials.

The two types of drug have not been tested together and theoretically could lead to a drop in blood pressure.