Liquid water takes up much less space than vapour and so a partial vacuum is created inside the can.

A partial vacuum is less likely to be formed, making the blade easier to withdraw.

"It is a matter of generating a partial vacuum in the mouth," he explained.

A partial vacuum is created in cups placed on the skin either by means of heat or suction.

"It should be no more than clear, still air in a partial vacuum."

Such partial vacuums only hold back water up to about 30 feet high.

Heat, cold, partial vacuum, they're all just outside the wall.

A partial vacuum may be generated by increasing the volume of a container.

Inside the glass tube is a partial vacuum and a small amount of mercury.

In this phase, pressure is controlled through the application of partial vacuum.