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.
Источник:
Русско-английский научно-технический словарь
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