• This amount of leakage necessitates ( or requires , or demands ) large volumes in reserve.
• The design calls for precision instrument ball bearings.
• Computer-integrated manufacturing systems call for the coordinated participation of computers in all phases of ...
• The implementation of these applications of radiation pressure to atoms calls for laser sources of sufficient power and tunability.
• The disadvantages of this system are the added equipment and maintenance costs it entails ( or involves ).