This economical system allows a diver to stay submerged for four hours or more.

Ramírez also created an economical system to promote agricultural development.

"It will be difficult to achieve but represents the best balance between passengers' needs and need to provide an efficient, economical system."

The net effect is not just a more economical system.

And it has to come together with changes for the whole political and economical system.

Economy An effective system is not necessarily an economical (efficient) system.

In turn, they offer seminars at the store on topics like the advantages of economical 12-volt systems.

Both of these differences allow for more economical systems.

A market economy is the economical system which gives the individual person greatest freedom of action".

He had significant role in the reorganizing of the economical system.