необходимый

см. тж. требуемый

• In order to carry out the needed (or required, or necessary) numerical estimates ...

• Appropriate amounts of malt sprouts were added to ...

• In this case high tensile strength arid corrosion resistance are (critical) requirements.

• Some revisions seem imperative.

• Having set the requisite number of bolts in ...

• The potentiometer offers the wanted performance characteristics.