"From a management perspective, it is useful to evaluate the most economical method of billing," Mr. Hirsch said.
Blueprinting, the first economical method for duplicating drawings, was invented in 1842 and introduced in the United States in 1876.
Where practical, pipelines have been found to be the safest and most economical method to transport petroleum.
If the part is mass-produced, an automated transfer line is often the most economical method of production.
However, the direct application of gaseous chlorine from pressurized steel containers is usually the most economical method for disinfecting large volumes of water.
The ability to reduce images, however, has led to the development of the microform, the most economical method of disseminating analog-form information.
The hit parade began in 1997 with I.B.M.'s announcement that it devised an economical method of laying copper circuits on microchips, a much more efficient conductor than aluminum.
The raison d'etre of Ya Bowl is the bowl meals, one-pot meals in which hot food is served over rice in a bowl, a delicious and economical method.
Replacing the entire existing PCCP with partial damages is not an economical method.
Among these techniques, immersion plating is the simplest and the most economical method [4, 5].
Melt intercalation has been widely accepted and an economical method for industrial applications.
