при необходимости

см. тж. если потребуется; по мере необходимости

• The plant permits inclusion of other elements for crushing, grinding, screening and concentration as may be required.

• This equipment could be moved elsewhere as the need arose.

• The bobbins may be put in parallel, if need be (or should the need arise), to increase the field strength.

• The table shaft is hollow so that if required (or necessary), hydraulic lines can be ...

• The device converts moderate pole spacing to fine pole spacing when needed.