Now, let the distance d approach the limit zero, while M is kept constant.

In order to keep constant, must not change either, i.e. is also flat.

The value of a ken could change from building to building, but was usually kept constant within the same structure.

Also, since the system's volume is kept constant, the system does no work on its surroundings.

Blood volume is kept constant by applying this corresponding pressure from the outside.

That way the pressure in the container is kept constant.

The design, structure, and length of the websites were all kept constant.

However in Gabon, the design has been kept constant since the nineteenth century.

When spreading, the water temperature must be kept constant.

The need for subsidies has increased due to higher oil prices while electricity tariffs have been kept constant.